December is a popular month to ask about Seaside Beach Oregon because conditions can shift week to week along this coast. Expect the water near 19.0°C, with daily variation from wind, tides and recent storms. We refresh the live value from Open-Meteo Marine every hour, so the headline above always reflects the current state of the Pacific Ocean.
Seaside Beach Oregon sea temperature in December — averages 19.0°C
The sea at Seaside Beach Oregon in United States averages 19.0°C during December, based on long-run climatology for the Pacific Ocean. Use the live reading below for today's actual water and the monthly grid to compare with the rest of the year.
Average sea · December
19.0°C
mild · Good
Live water now
…
Recommended wetsuit
Shorty 2mm
At 19.0°C a 2mm shorty keeps surfers warm; lap swimmers can usually skip the neoprene.
Monthly comparison
Yes, but expect a fresh dip · Seaside Beach Oregon
Can you swim at Seaside Beach Oregon in June? — 26.0°C water26.0°CCan you swim at Seaside Beach Oregon in July? — 28.0°C water28.0°CCan you swim at Seaside Beach Oregon in August? — 28.0°C water28.0°CCan you swim at Seaside Beach Oregon in September? — 27.0°C water27.0°CCan you swim at Seaside Beach Oregon in October? — 25.0°C water25.0°CCan you swim at Seaside Beach Oregon in November? — 22.0°C water22.0°C
Frequently asked questions
What is the average sea temperature at Seaside Beach Oregon in December?
Seaside Beach Oregon averages 19.0°C in December, based on long-run climatology for the Pacific Ocean.
Is the sea warm enough to swim at Seaside Beach Oregon in December?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Seaside Beach Oregon in December?
A 2 mm shorty is comfortable for sessions over 30 minutes.