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Norwegian Ice Service

We provide the national ice service for vessel traffic. This includes updated information on ice conditions in Norwegian waters from the Swedish border to Kristiansand, and information on icebreaking in the main and secondary fairways outside port areas. Ice reports are available from December 1 to March 31.

In sub-zero temperatures, the ice thickens in fjords and the narrow straits along the coast of southern Norway. Throughout the winter season, we monitor and report on the ice situation from the Swedish border in the east to Rogaland in the southwest.

Ice reports

See our latest updates on ice for individual ports and fairways last update 12.04.2024.

AA1 0/// Sekken (Halden).Ice-free. 15.01.2024

AA2 0/// Singlefjorden (Halden).Ice-free. 15.01.2024

AA3 33// Svinesund - Halden (Halden).Open pack ice. 4/10-6/10 ice.Grey-white ice. 15-30 cm. 15.01.2024

AA4 0/// Torbjørnskjær (Oslofjorden).Ice-free. 04.12.2023

AA5 0/// Struten (Oslofjorden).Ice-free. 01.12.2023

AA6 0/// Løperen (Fredrikstad).Ice-free. 01.12.2023

BB1 0/// Østerelva (Fredrikstad).Ice-free. 01.12.2023

BB2 0/// Leira (Fredrikstad).Ice-free. 01.12.2023

BB3 0/// Vesterelva (Fredrikstad).Ice-free. 01.12.2023

BB4 0/// Rauøyfjorden (Oslofjorden).Ice-free. 01.12.2023

BB5 0/// Verlebukta (Moss).Ice-free. 02.03.2024

BB6 0/// Mossesundet (Moss).Ice-free. 23.02.2024

CC1 0/// Oslo - Spro (Oslo).Ice-free. 16.01.2024

CC2 0/// Spro - Drøbak (Oslofjorden).Ice-free. 16.01.2024

CC3 0/// Drøbak - Filtvet (Oslofjorden).Ice-free. 16.01.2024

CC4 0/// Filtvet - Gullholmen (Oslofjorden).Ice-free. 16.01.2024

 0000 Port of Oslo-Vesthavna-Filipstad/Hjortnes.Ice-free.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation unobstructed. 16.01.2024

 0000 Port of Oslo-Vesthavna-Pipevika/Akershuskai.Ice-free.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation unobstructed. 16.01.2024

 0000 Port of Oslo-Vesthavna-Vippetangen.Ice-free.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation unobstructed. 16.01.2024

 4001 Port of Oslo-Vesthavna-Revier kaia/Bjørvika.Close pack ice. 6/10-8/10 ice.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation difficult or dangerous for wooden vessels without ice sheathing. 16.01.2024

 4001 Port of Oslo-Østhavna-Bispevika/Sørenga.Close pack ice. 6/10-8/10 ice.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation difficult or dangerous for wooden vessels without ice sheathing. 16.01.2024

 0000 Port of Oslo-Østhavna-Grønlia.Ice-free.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation unobstructed. 16.01.2024

 0000 Port of Oslo-Østhavna-Kongshavn/Sjursøya N.Ice-free.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation unobstructed. 16.01.2024

 4001 Port of Oslo-Sydhavna-S.Sjursøykai/Tank utst.Close pack ice. 6/10-8/10 ice.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation difficult or dangerous for wooden vessels without ice sheathing. 16.01.2024

 3001 Port of Oslo-Sydhavna-Bekkelaget/OrmsundOpen pack ice. 4/10-6/10 ice.New ice. Less than 5 cm.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation difficult or dangerous for wooden vessels without ice sheathing. 16.01.2024

CC5 0/// Drammensfjorden (Drammen).Ice-free. 28.03.2024

CC6 0/// Breiangen (Oslofjorden).Ice-free. 14.02.2024

DD1 0/// Langrunnen (Horten).Ice-free. 01.03.2024

DD2 0/// Gullholmen - Mefjordbåen (Oslofjorden).Ice-free. 01.03.2024

DD3 0/// Mefjordbåen - Fulehuk (Oslofjorden).Ice-free. 01.03.2024

DD4 0/// Fulehuk - Færder (Oslofjorden).Ice-free. 01.12.2023

DD5 0/// West Færder (Oslofjorden).Ice-free. 01.12.2023

DD6 0/// South Færder (Oslofjorden).Ice-free. 01.12.2023

EE1 0/// Torgersøygapet (Tønsberg).Ice-free. 27.12.2023

EE2 0/// Husøysund (Tønsberg).Ice-free. 27.12.2023

EE3 82/3 Tønsberg indre havn (Tønsberg)Fast ice.Grey ice. 10-15 cm.Navigation without icebreaker assistance possible only for high-powered vessels of strong construction and suitable for navigation in ice. 27.12.2023

EE4 6963 Vestfjorden (Tønsberg).Compact pack ice. 10/10 ice.Ice predominately thicker than 30 cm.Compacted slush or shuga, or compacted brash ice.Navigation without icebreaker assistance possible only for high-powered vessels of strong construction and suitable for navigation in ice. 21.02.2024

EE5 0/// Leisteinløpet (Tønsberg).Ice-free. 27.12.2023

EE6 0/// Vrengen (Tønsberg).Ice-free. 27.12.2023

FF1 0/// Tjømekjæla (Tønsberg).Ice-free. 27.12.2023

FF2 0/// Sandefjorden (Sandefjord).Ice-free. 01.12.2023

FF3 0/// Inside Svenner (Sandefjord).Ice-free. 01.12.2023

FF4 0/// Outside Svenner (Sandefjord).Ice-free. 01.12.2023

FF5 121/ Larviksfjorden (Larvik).Open water. Less than 1/10 ice.Grey ice. 10-15 cm.Small ice floes. 20-100m across. 09.01.2024

FF6 0/// Langesundsbukta (Porsgrunn).Ice-free. 01.12.2023

GG1 0/// Breviksfjorden (Porsgrunn).Ice-free. 01.12.2023

GG2 0/// Frierfjorden (Porsgrunn).Ice-free. 01.12.2023

GG3 0//0 Jomfrulandsrenna (Kragerø).Ice-free.Navigation unobstructed. 18.03.2024

GG4 0//0 Outside Jomfruland (Kragerø).Ice-free.Navigation unobstructed. 18.03.2024

GG5 0//0 Skåtøysund (Kragerø).Ice-free.Navigation unobstructed. 18.03.2024

GG6 0//0 Langårsund (Kragerø).Ice-free.Navigation unobstructed. 18.03.2024

HH1 0/// Kragerøfjorden (Kragerø).Ice-free. 18.03.2024

 0//0 Kilsfjorden (Kragerø).Ice-free.Navigation unobstructed. 18.03.2024

 0//0 Hellefjorden (Kragerø).Ice-free.Navigation unobstructed. 18.03.202

HH2 0/// Grønholmsgapet (Risør).Ice-free. 01.12.2023

HH3 0/// Stangholmgapet (Risør).Ice-free. 01.12.2023

HH4 0/// Lyngørfjorden (Tvedestrand).Ice-free. 01.12.2023

HH5 0/// Outside Lyngør (Tvedestrand).Ice-free. 01.12.2023

HH6 0/// Tvedestrandsfjorden (Tvedestrand).Ice-free. 01.12.2023

II1 0/// Tromøysund (Arendal).Ice-free. 26.03.2024

II2 0/// Galtesund (Arendal).Ice-free. 26.03.2024

II3 0/// Inside Torungen (Arendal).Ice-free. 26.03.2024

II4 0/// Outside Torungen (Arendal).Ice-free. 26.03.2024

II5 0/// Grimstad (Grimstad).Ice-free. 01.12.2023

II6 0/// Inside Homborsund (Grimstad).Ice-free. 01.12.2023

JJ1 0/// Outside Homborsund (Grimstad).Ice-free. 01.12.2023

JJ2 0/// Lillesand (Lillesand).Ice-free. 01.12.2023

JJ3 0/// Kristiansandsfjorden (Kristiansand).Ice-free. 01.12.2023

JJ4 0/// Outside Oksøy (Kristiansand).Ice-free. 01.12.2023

JJ5 0//0 Farsund.Ice-free.Navigation unobstructed. 21.02.2024

KK1 7734 Sauda Fast ice with pack ice outside.Ice predominately thinner than 15 cm.Big ice floes. 500-2000m across.Navigation proceed in lead or broken ice-channel without assistance of an ice breaker. 08.12.2023

LL1 9344 Nærøyfjorden.Lead in very close or compact pack ice or along the fast ice edge.Grey-white ice. 15-30 cm.Vast or giant ice floes. More than  2000m across.Navigation proceed in lead or broken ice-channel without assistance of an ice breaker. 10.01.2024

MM1 8131 Surnadalsfjorden.Fast ice.Light nilas. 5-10 cm.Big ice floes. 500-2000m across.Navigation difficult or dangerous for wooden vessels without ice sheathing. 07.02.2024

NN1 0/// Beistadfjorden.Ice-free. 07.12.2023

NN2 0/// Follafoss.Ice-free. 07.12.2023

OO1 0/// Namsos.Ice-free. 01.12.2023

PP1 1/00 Kirkenes Havn (Sør Varanger).Open water. Less than 1/10 ice.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation unobstructed. 12.04.2024

PP2 1/00 Bøkfjorden (Sør Varanger).Open water. Less than 1/10 ice.Pancake ice, ice cakes, brash ice. Less than 20m across.Navigation unobstructed. 12.04.2024

 

 

Area codes

Kode
Code

Område
Area

Kode
Code

Område
Area

AA1

Sekken (Halden)

FF4

Outside Svenner (Sandefjord)

AA2

Singlefjorden (Halden)

FF5

Larviksfjorden (Larvik)

AA3

Svinesund - Halden (Halden)

FF6

Langesundsbukta (Porsgrunn)

AA4

Torbjørnskjær (Oslofjorden)

GG1

Breviksfjorden (Porsgrunn)

AA5

Struten (Oslofjorden)

GG2

Frierfjorden (Porsgrunn)

AA6

Løperen (Fredrikstad)

GG3

Jomfrulandsrenna (Kragerø)

BB1

Østerelva (Fredrikstad)

GG4

Outside Jomfruland (Kragerø)

BB2

Leira (Fredrikstad)

GG5

Skåtøysund (Kragerø)

BB3

Vesterelva (Fredrikstad)

GG6

Langårsund (Kragerø)

BB4

Rauøyfjorden (Oslofjorden)

HH1

Kragerøfjorden (Kragerø)

BB5

Verlebukta (Moss)

HH2

Grønholmsgapet (Risør)

BB6

Mossesundet (Moss)

HH3

Stangholmgapet (Risør)

CC1

Oslo - Spro (Oslo)

HH4

Lyngørfjorden (Tvedestrand)

CC2

Spro - Drøbak (Oslofjorden)

HH5

Outside Lyngør (Tvedestrand)

CC3

Drøbak - Filtvet (Oslofjorden)

HH6

Tvedestrandsfjorden (Tvedestrand)

CC4

Filtvet - Gullholmen (Oslofjorden)

II1

Tromøysund (Arendal)

CC5

Drammensfjorden (Drammen)

II2

Galtesund (Arendal)

CC6

Breiangen (Oslofjorden)

II3

Inside Torungen (Arendal)

DD1

Langrunnen (Horten)

II4

Outside Torungen (Arendal)

DD2

Gullholmen - Mefjordbåen (Oslofjorden)

II5

Grimstad (Grimstad)

DD3

Mefjordbåen - Fulehuk (Oslofjorden)

II6

Inside Homborsund (Grimstad)

DD4

Fulehuk - Færder (Oslofjorden)

JJ1

Outside Homborsund (Grimstad)

DD5

West Færder (Oslofjorden)

JJ2

Lillesand (Lillesand)

DD6

South Færder (Oslofjorden)

JJ3

Kristiansandsfjorden (Kristiansand)

EE1

Torgersøygapet (Tønsberg)

JJ4

Outside Oksøy (Kristiansand)

EE2

Husøysund (Tønsberg)

KK1

Sauda

EE3

Tønsberg indre havn (Tønsberg)

LL1

Nærøyfjorden

EE4

Vestfjorden (Tønsberg)

MM1

Beistadfjorden

EE5

Leisteinløpet (Tønsberg)

MM2

Follafoss

EE6

Vrengen (Tønsberg)

NN1

Namsos

FF1

Tjømekjæla (Tønsberg)

PP1

Kirkenes Havn(Sør Varanger)

FF2

Sandefjorden (Sandefjord)

PP2

Bøkfjorden(Sør Varanger)

FF3

Inside Svenner (Sandefjord)

 

 

Ice codes

The Norwegian Ice Service provides ice codes from ”The Baltic Sea Ice Code”. The code consists of four sections; AB-SB-TB-KB. See description below.

Please see ”The Baltic Sea Ice Code” for more detailed description and images of ice types. A complete ice report consists of an area code followed by an ice code (for example CC1 4111).


AB
 
0
1
2
3
4
5
6
7
8
9
/

Amount and arrangement of Sea ice.
Ice-free.
Open water.  Less than 1/10 ice.
Very open pack ice.  1/10-4/10 ice.
Open pack ice.  4/10-6/10 ice.
Close pack ice.  6/10-8/10 ice. 
Very close pack ice.  8/10-9/10 ice.
Compact pack ice.  10/10 ice. 
Fast ice with pack ice outside. Fast ice. 
Lead in very close or compact pack ice or along the fast ice edge Impossible to report

SB 
0
1
2
3
4
5
6
7
8
9
/
Stage of development (ice thickness)
New ice.  Less than 5cm.
Light nilas.  5-10cm.
Grey ice.  10-15cm.
Grey-white ice.  15-30cm.
White ice, first stage.  30-50cm. 
White ice, second stage.  50-70cm.
Medium first year ice.  70-120cm.
Ice predominately thinner than 15cm.
Ice predominately 15-30cm.
Ice predominately thicker than 30cm.
No info. or unable to report.
TB 
0
1
2
3
4
5
6
7
8
9
/
Topography or form of ice
Pancake ice, ice cakes, brash ice.  Less than 20m across.
Small ice floes.  20-100m across.
Medium ice floes.  100-500m across.
Big ice floes.  500-2000m across.
Vast or giant ice floes. More than 2000m across.
Rafted ice.
Compacted slush or shuga, or compacted brash ice.
Hummocked or ridged ice.
Thaw holes or many puddles on ice.
Rotten ice.
No information or unable to report.

KB 
0
1
2

3

4

5

6

7
8
9
/

Navigation conditions in ice.
Navigation unobstructed.
Navigation difficult or dangerous for wooden vessels without ice sheathing.
Navigation difficult for unstrengthened or low-powered vessels built of iron or steel. Navigation for wooden vessels even with ice sheathing not advisable.
Navigation without icebreaker assistance possible only for high-powered vessels of strong      construction and suitable for navigation in ice.
Navigation proceeds in lead or broken ice-channel without the assistance of an icebreaker. 
Icebreaker assistance can only be given to vessels suitable for navigation in ice and of  special size.
Icebreaker assistance can only be given to vessels of special ice class and of special size.
Icebreaker assistance can only be given to vessels after special permission.
Navigation temporarily closed.
Navigation has ceased / Unknown.

 

Ice class

Swedish – Finnish Ice Class

Det norske Veritas Ice Class

For navigation in

Istykkelse

1A Super

 

 

ICE-1A*

 

 
Extremely difficult ice-conditions Ekstreme isforhold

› 100 cm

 

 

1A

ICE-1A

Difficult ice-conditions
Vanskelige isforhold

› 50 - 100 cm

1B

ICE-1B

Moderately difficult ice-conditions Moderate isforhold

30 – 50 cm

1C

ICE-1C

Easy ice-conditions Lette isforhold

15 – 30 cm

II

 

 

ICE-C

Very easy ice-conditions
Meget lette isforhold

10 – 15 cm

Icebreaking

When the ice thickens and settles, the Norwegian Coastal Administration ensures that icebreakers clear the way. Icebreakers in Norway are private tugboats that are particularly suitable for icebreaking. During severe winters, we mobilize more resources from the Coast Guard, the Norwegian Coastal Administration and other private enterprises.

It is our responsibilty to keep the main and secondary fairways navigable. Port areas and the municipalities' sea areas are otherwise the responsibility of the municipalities / port authorities.

BIM

Norway is a member of BIM (Baltic Icebreaker Management), an international icebreaker collaboration involving Sweden, Finland, Russia, Estonia, Latvia, Poland, Germany and Denmark. The cooperation seeks to increase competence and cooperation between the nations.

Contact information

Tel:  +47 37 01 97 59 / +47 37 01 97 25   

Mobile:  +47 417 65 255 / +47 900 77 605     

Fax:  +47 37 01 97 01    

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