Current sea water temperature:
+40.6°F
| Minimum sea water temperature in December: | 50.9°F |
| Maximum sea water temperature in December: | 39.7°F |
| Average sea water temperature in December: | 45.6°F |
| more information | |
14 days
forecast
forecast
| Siasconset |
monthly
weather
weather
| Siasconset |
Sea water temperature for the last 10 days:
| December 23 | 40.6°F | December 18 | 40.1°F |
| December 22 | 40.1°F | December 17 | 42.8°F |
| December 21 | 39.9°F | December 16 | 42.3°F |
| December 20 | 39.7°F | December 15 | 42.4°F |
| December 19 | 40.6°F | December 14 | 42.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Siasconset?
Based on the data about daily sea water temperature for the last three years the warmest sea in Siasconset was noticed in August, July and September.
Monthly Sea Temperatures in Siasconset, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 67.8°F. The highest and lowest sea temperatures during the month were 70.9°F and 65.5°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 67.0°F. The highest and lowest sea temperatures during the month were 70.2°F and 61.2°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 66.2°F. The highest and lowest sea temperatures during the month were 68.5°F and 64.6°F.
current
weather
weather
| Siasconset |
weather in
December
December
| Siasconset |
Best time for vacation in Siasconset
Siasconset on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Siasconset
Local time: 19:04
December 23, tuesday
2100
39°F
N
14 mph
14 mph
December 24, wednesday
0000
39°F
E
19 mph
19 mph
0300
39°F
E
20 mph
20 mph
0600
39°F
E
25 mph
25 mph
0900
39°F
SE
32 mph
32 mph
1200
39°F
SE
38 mph
38 mph
1500
41°F
S
33 mph
33 mph
1800
39°F
S
25 mph
25 mph
