Measurements:
°C
°F
Juneau
40°F
NW 4 mph
Feels like: 38°F
Precip: 100%
World Resorts USA Juneau Weather

Juneau Sea Water Temperature

Current Sea Water Temperature:
+44.0°F
Maximum Sea Water Temperature in May: 52.2°F
Minimum Sea Water Temperature in May: 40.6°F
Average water temperature in May: 45.5°F

Sea Water Temperature for the Last 10 Days:

May 14 44.0°F May 09 42.2°F
May 13 42.2°F May 08 41.8°F
May 12 42.6°F May 07 42.4°F
May 11 43.0°F May 06 42.0°F
May 10 43.0°F May 05 41.2°F

When is the Warmest Sea for Juneau?

According to our data for the last three years for Juneau the highest average sea water temperature was in July, August and September.

Average Water Temperature by Month, °F

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Juneau was 54.7°F. The maximum and minimum values were 52.6°F and 57.2°F respectively.

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Juneau was 56.7°F. The maximum and minimum values were 54.8°F and 58.8°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Juneau was 53.8°F. The maximum and minimum values were 49.2°F and 59.2°F respectively.

Best Time to Visit Juneau
The most sunny months:
May 6 days
February 5 days
March 5 days
The most warm months:
July 58.1 °F
August 58.0 °F
June 54.9 °F
Warmest sea temperature:
July 57.0 °F
August 56.8 °F
September 52.0 °F
The most cold months:
December 23.9 °F
January 26.3 °F
February 28.1 °F
The most rainy months:
October 12 days
September 10 days
January 9 days
The most windy months:
November 7 mph
December 7 mph
January 7 mph

Juneau on the Weather Map

USA Resorts:
NAME
Boston +56
Chicago +58
Hawaii +78
Honolulu +78
Houston +104
Las Vegas +102
Los Angeles +76
Maui +72
Miami +90
Miami Beach +92
New York +70
San Diego +72
San Francisco +72
Sarasota +96
Tampa +96
24 Hours Weather Forecast
Juneau
Local time: 10:58
14 may, thursday
1200 40°F
NW
4 mph
1500 42°F
NW
3 mph
1800 44°F
NW
2 mph
2100 40°F
NW
1 mph
15 may, friday
0000 34°F
W
3 mph
0300 28°F
SW
4 mph
0600 36°F
SW
2 mph
0900 42°F
SE
2 mph