Can you swim at Half Moon Bay in December? — 19.0°C water
Yes, but expect a fresh dip
Average sea · December
19.0°C
Live water now
…
Recommended wetsuit
Shorty 2mm
mild
It depends. Half Moon Bay sits around 19.0°C in December; confident swimmers will be fine, casual bathers may prefer short sessions.
Monthly averages set expectations, but the specific beach today depends on wind, swell and recent weather. Check the live value at the top of this page or open the Half Moon Bay live page for full conditions.
Best months to swim
May · June · July · August · September · October
Frequently asked questions
What is the average sea temperature at Half Moon Bay in December?
Half Moon Bay averages 19.0°C in December, based on long-run climatology for the Persian Gulf.
Is the sea warm enough to swim at Half Moon Bay in December?
It is swimmable but fresh; confident swimmers will be fine without a wetsuit.
Do I need a wetsuit at Half Moon Bay in December?
A 2 mm shorty is comfortable for sessions over 30 minutes.
