Measurements:
°C
°F
Juneau
38°F
SW 3 mph
Feels like: 36°F
Precip: 21%
World Resorts USA Juneau Weather

Juneau Sea Water Temperature

Current Sea Water Temperature:
+52.6°F
Maximum Sea Water Temperature in September: 59.2°F
Minimum Sea Water Temperature in September: 48.0°F
Average water temperature in September: 52.1°F

Sea Water Temperature for the Last 10 Days:

September 15 52.6°F September 10 53.2°F
September 14 52.0°F September 09 54.0°F
September 13 51.8°F September 08 54.0°F
September 12 52.2°F September 07 53.8°F
September 11 52.2°F September 06 53.6°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 August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Juneau was 57.5°F. The maximum and minimum values were 54.2°F and 60.2°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Juneau was 54.7°F. The maximum and minimum values were 52.4°F and 57.2°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Juneau was 53.2°F. The maximum and minimum values were 51.8°F and 54.8°F respectively.

Best Time to Visit Juneau
The most sunny months:
February 5 days
March 5 days
April 5 days
The most warm months:
July 57.2 °F
August 56.6 °F
June 54.4 °F
Warmest sea temperature:
August 56.9 °F
July 56.6 °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 +64
Chicago +66
Hawaii +80
Las Vegas +80
Los Angeles +74
Maui +66
Miami +92
Myrtle Beach +88
New York +72
Panama City Beach +90
San Diego +72
San Francisco +60
Santa Monica +72
Sarasota +94
Washington +76
24 Hours Weather Forecast
Juneau
Local time: 07:14
15 sep, tuesday
0900 40°F
NE
1 mph
1200 42°F
NE
2 mph
1500 42°F
NE
3 mph
1800 40°F
SW
1 mph
2100 40°F
NW
3 mph
16 sep, wednesday
0000 40°F
N
5 mph
0300 42°F
N
7 mph
0600 40°F
N
9 mph