Can I swim at Sea Street Beach right now?

The sea at Sea Street Beach is currently 23.9°C — great swimming conditions. Most swimmers will find the water comfortable when it's above 22°C; below 18°C feels fresh and a wetsuit is recommended.

What will the sea temperature be at Sea Street Beach next week?

Based on long-term July averages and the latest marine model, expect the sea around Sea Street Beach to sit close to 19.0°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.

When is the best month to swim at Sea Street Beach?

July – August – September are typically the warmest months to swim at Sea Street Beach, with sea temperatures at their seasonal peak.

Do I need a wetsuit at Sea Street Beach?

With water currently at 23.9°C: above 22°C no wetsuit needed; 18–22°C a shorty is comfortable for long swims; 14–18°C a 3/2mm full suit; below 14°C a 4/3mm or thicker.

United States

Massachusetts · Atlantic Ocean

Sea Street Beach

Family Hyannis-side beach.

Pleasant water with a light chop and a moderate breeze — great swimming conditions.

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Sea temperature now

23.9°Cwarm

Excellent

Updated just now · Source: Open-Meteo Marine

Air temperature

25.2°C

Wave height

0.7 m

Wind

15.8 km/h

UV index

0.0 UV index

Location

Sea Street Beach on the map, with nearby beaches and live sea temperatures.

7-day forecast

Water, air, waves, wind and UV outlook for the week ahead.

Wetsuit recommendation

Rash vest or swimsuit

At 23.9°C most swimmers and surfers are comfortable in a swimsuit or thin rash top.

Surf & watersports

Warm summer-Mediterranean range. A UV-rated rash vest adds sun protection without restricting your stroke. Children and slim swimmers may prefer a thin 1.5mm shorty for sessions over 45 minutes.

Open-water swimming

Comfortable for unlimited swim duration; rash vest cuts UV and chafing.

Recommendation tuned for Sea Street Beach's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.

Quick answer

Can I swim at Sea Street Beach today?

The sea is currently 23.9°C — excellent swimming conditions. Most swimmers will find it pleasant.

Key takeaways

• Located in Massachusetts, United States (Atlantic Ocean).
• Family friendly with calm, accessible water.
• Live data refreshed hourly from Open-Meteo Marine.

Monthly sea temperature averages

Tap any month to see what to expect — based on regional climatology.

Jan4°C Feb3°C Mar4°C Apr6°C May10°C Jun15°C Jul19°C Aug20°C Sep18°C Oct14°C Nov10°C Dec6°C

3°C → 20°C· Current month outlined· “Best” = within 2°C of the annual peak

Year-round sea temperature

Best swim months: Aug

Month	Sea	Comfort
Jan	4°C	Cold
Feb	3°C	Cold
Mar	4°C	Cold
Apr	6°C	Cold
May	10°C	Cold
Jun	15°C	Bracing
Jul	19°C	Pleasant
Aug ⭐	20°C	Pleasant
Sep	18°C	Pleasant
Oct	14°C	Bracing
Nov	10°C	Cold
Dec	6°C	Cold

Can you swim here? — Sea Street Beach