Water temperature in Juneau (AK) in August
Is it warm enough to swim in Juneau in August? Average water temperature in Juneau in August is 55.6°F and therefore is not suitable for comfortable swimming. The warmest sea in Juneau in August is 61°F, and the coldest is 49.5°F. Average high air temperature in Juneau in August is 63°F, and average low temperature is 49°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Juneau
Changes water temperature in Juneau in August 2025, 2024
To get an accurate forecast for the water temperature in Juneau for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Juneau, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of August.
You can choose any other years:
| Day | 2025 | 2024 | Min | Max |
|---|---|---|---|---|
| August 1 | 57°F | 55°F | 52.5°F | 60.8°F |
| August 2 | 57°F | 54.5°F | 52.7°F | 60.8°F |
| August 3 | 56.8°F | 55.8°F | 50.5°F | 60.1°F |
| August 4 | 57.9°F | 56.5°F | 50.2°F | 59.7°F |
| August 5 | 57.6°F | 57.4°F | 50.5°F | 60.3°F |
| August 6 | 58.1°F | 57.9°F | 50.4°F | 60.3°F |
| August 7 | 58.6°F | 58.5°F | 50.9°F | 60.8°F |
| August 8 | 58.3°F | 59.7°F | 51.1°F | 60.4°F |
| August 9 | 58.1°F | 61°F | 51.6°F | 61°F |
| August 10 | 57.7°F | 59°F | 51.6°F | 59°F |
| August 11 | 57.6°F | 59.4°F | 51.3°F | 59.4°F |
| August 12 | 57.4°F | 57.9°F | 50.7°F | 60.1°F |
| August 13 | 55.2°F | 57.2°F | 51.8°F | 60.6°F |
| August 14 | 55.2°F | 56.7°F | 50.5°F | 59.9°F |
| August 15 | 57°F | 56.7°F | 50.4°F | 60.4°F |
| Day | 2025 | 2024 | Min | Max |
|---|---|---|---|---|
| August 16 | 56.8°F | 58.3°F | 50.9°F | 60.1°F |
| August 17 | 56.7°F | 58.1°F | 50.7°F | 59.4°F |
| August 18 | 56.7°F | 57.6°F | 50.9°F | 58.5°F |
| August 19 | 55.9°F | 57.7°F | 51.4°F | 57.7°F |
| August 20 | 57°F | 57.7°F | 51.6°F | 57.7°F |
| August 21 | 57.2°F | 56.7°F | 51.8°F | 57.2°F |
| August 22 | 56.7°F | 56.1°F | 50.2°F | 57.6°F |
| August 23 | 55.9°F | 56.1°F | 50.4°F | 57°F |
| August 24 | 56.7°F | 56.1°F | 50.7°F | 58.1°F |
| August 25 | 56.5°F | 55.9°F | 51.1°F | 57°F |
| August 26 | 55.9°F | 55.8°F | 50.5°F | 57.7°F |
| August 27 | 56.1°F | 54.7°F | 50.2°F | 57.2°F |
| August 28 | 56.1°F | 54.9°F | 49.5°F | 57.6°F |
| August 29 | 56.8°F | 54.9°F | 50.7°F | 59°F |
| August 30 | 57°F | 54.7°F | 50.7°F | 58.1°F |
| August 31 | 56.5°F | 54.3°F | 50.9°F | 57.6°F |
Average water temperature in Juneau in August over a decade
| 2016 | 2017 | 2018 | 2019 | 2020 |
| 56.7°F | 55.8°F | 56.3°F | 56.8°F | 54.9°F |
| 2021 | 2022 | 2023 | 2024 | 2025 |
| 57°F | 55.8°F | 58.1°F | 56.8°F | 57.7°F |
Juneau sea state in August
Chart comparing the height of waves in Juneau in August over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.
Weather and climate in Juneau in August
This data display average monthly climate indicators in Juneau in August based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip
- Average HIGH temperature63°F
- Average LOW temperature49°F
- Average humidity
84 - Average rainfall days19 days
- Average rainfall145mm/5.7''
- Average daylight15h
- Average sunshine5.2h
- Average UV index4
Juneau water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below
