Current sea water temperature:
+53.4°F
| Minimum sea water temperature in December: | 53.4°F |
| Maximum sea water temperature in December: | 47.7°F |
| Average sea water temperature in December: | 50.6°F |
| more information | |
14 days
forecast
forecast
| Seaside |
monthly
weather
weather
| Seaside |
Sea water temperature for the last 10 days:
| December 20 | 53.4°F | December 15 | 51.1°F |
| December 19 | 52.7°F | December 14 | 50.9°F |
| December 18 | 52.9°F | December 13 | 51.1°F |
| December 17 | 52.5°F | December 12 | 51.1°F |
| December 16 | 52.3°F | December 11 | 52.3°F |
Monthly sea water temperature, °F
When is the warmest sea in Seaside?
Based on the data about daily sea water temperature for the last three years the warmest sea in Seaside was noticed in August, July and September.
Monthly Sea Temperatures in Seaside, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 57.3°F. The highest and lowest sea temperatures during the month were 60.1°F and 55.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 53.3°F. The highest and lowest sea temperatures during the month were 55.8°F and 50.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 55.5°F. The highest and lowest sea temperatures during the month were 58.8°F and 50.7°F.
current
weather
weather
| Seaside |
weather in
December
December
| Seaside |
Best time for vacation in Seaside
Seaside on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Seaside
Local time: 02:41
December 20, saturday
0300
43°F
NE
14 mph
14 mph
0600
43°F
NE
15 mph
15 mph
0900
45°F
NE
14 mph
14 mph
1200
48°F
NE
16 mph
16 mph
1500
48°F
NE
15 mph
15 mph
1800
48°F
NE
14 mph
14 mph
2100
48°F
N
12 mph
12 mph
December 21, sunday
0000
46°F
N
14 mph
14 mph
