Groton Beach
Connecticut · United States
Rating right now
Groton Beach is a N-facing sand beach on the James Bay coastline near Connecticut — it picks up NW–NE swell and turns cleanest in a SE–SW wind, with the most consistent surf through april–october.
Today's surf at Groton Beach
Updated 22:05 spot time
Groton Beach surf report for Wednesday 30 Sept: waves 1 ft ankle to knee high, 0.5 ft SSE swell at 6.05 s. Wind up to 6 mph SSW. Water 66°F. Best surf window around 3:00 AM — fair (2/5) with 3 mph N wind.
Snapshot refreshed hourly — the live hourly forecast below updates in real time.
10-day forecast
Local time · updates hourly
Wave height & period
Wind
| Time | Rating | Waves | Swell | Wind | Air |
|---|---|---|---|---|---|
Water temperature by month
This month: ~17.4°C (63.3°F) on average
Jan
6°C
42.8°F · 2.5–8.8°C
Feb
3.9°C
39°F · 1.7–6.1°C
Mar
4.4°C
39.9°F · 1.2–8.1°C
Apr
7°C
44.6°F · 3.9–11.3°C
May
11.3°C
52.3°F · 9.1–16.3°C
Jun
16.5°C
61.7°F · 11.8–20.4°C
Jul
20.5°C
68.9°F · 18.3–22.9°C
Aug
21.7°C
71.1°F · 19.8–24.2°C
Sep
20.4°C
68.7°F · 18.2–22.7°C
Oct
17.4°C
63.3°F · 14.5–19.4°C
Nov
13.2°C
55.8°F · 10.6–16.3°C
Dec
9.2°C
48.6°F · 6.7–11.9°C
25-year monthly averages from the NOAA OISST satellite record — typical range min–max, not a live reading.
Know before you go
Best swell
NW–NE
Best wind
SE–SW
Break type
Beach break
Best season
April–October
Safety: Friendly by surf standards, but rip currents and drop-in etiquette still apply. Shifting sandbars create moving rip currents — learn to spot them and use them to get out back.
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