Current sea water temperature:
+55.8°F
| Minimum sea water temperature in September: | 63.1°F |
| Maximum sea water temperature in September: | 51.3°F |
| Average sea water temperature in September: | 56.0°F |
| more information | |
14 days
forecast
forecast
| Ketchikan |
monthly
weather
weather
| Ketchikan |
Sea water temperature for the last 10 days:
| September 13 | 55.8°F | September 8 | 57.4°F |
| September 12 | 56.5°F | September 7 | 58.1°F |
| September 11 | 56.8°F | September 6 | 57.7°F |
| September 10 | 57.9°F | September 5 | 57.2°F |
| September 9 | 57.7°F | September 4 | 57.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Ketchikan?
Based on the data about daily sea water temperature for the last three years the warmest sea in Ketchikan was noticed in August, July and September.
Monthly Sea Temperatures in Ketchikan, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 59.1°F. The highest and lowest sea temperatures during the month were 61.9°F and 57.4°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 58.1°F. The highest and lowest sea temperatures during the month were 60.4°F and 55.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 57.1°F. The highest and lowest sea temperatures during the month were 63.1°F and 52.9°F.
current
weather
weather
| Ketchikan |
weather in
September
September
| Ketchikan |
Best time for vacation in Ketchikan
Ketchikan on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Ketchikan
Local time: 14:08
September 13, sunday
1500
63°F
SE
12 mph
12 mph
1800
59°F
SE
8 mph
8 mph
2100
55°F
S
6 mph
6 mph
September 14, monday
0000
54°F
S
6 mph
6 mph
0300
54°F
S
4 mph
4 mph
0600
52°F
S
4 mph
4 mph
0900
55°F
S
2 mph
2 mph
1200
61°F
E
1 mph
1 mph
