Sunny, high near 71°. No real rain risk. All-day beach window.
forecastRain OutlookOpen-Meteo
tap an hourTop rain chance is just 1% — pack the sunscreen, not the umbrella.
Tide
0.3 ft · falling ↘
Next low tide
12:24 PM 0.2 ft
T−…
1.9 ft of drop from the 7:54 AM high; the wet sand is widest from about 11:24 AM.
Wind
12 mph
from the WSW
UV Index
Moderate
easy sunscreen day
Time to Burn
UV 3 · incl. sand glarefor unprotected fair skin (burns easily, tans a little). SPF 30 if you are out for more than an hour.
An estimate from the standard erythemal dose model, not a medical limit. Darker skin burns more slowly than this, people vary either way, and sunscreen only helps if you use enough of it and reapply.
Rip Current Riskestimated
todayCalm pattern today. Currents can still surprise — keep kids within reach.
Caught in one? Don’t fight it. Swim parallel to the beach until you’re free, then angle back in.
Beach Flag
Green Flag
calm, swim easy
estimated · trust the lifeguard
Stingers & Biters
modelled, not observedBased on wind, water temperature and humidity. Nobody publishes a live count, so this is what conditions favour today.
No-see-umsUnlikely
9 mph breeze around sunset should keep them down.
Water by Monthtypical
avg 2021–2024Warmest around August (67°), coolest around February (38°).
surf’s up (gently)
Tides are NOAA predictions (Nantasket Beach station 8443970); temps, wind, UV, waves and water temp are live from Open-Meteo; rip current risk from the NWS surf-zone forecast. Flag status is estimated from wave height and wind, so always trust the lifeguard’s actual flag over this app.
The water at Nantasket Beach is 55°F (13°C) today, 5°F warmer than the usual 50°F for November. For swimming it is cold: most swimmers want a wetsuit. Waves are 1–2 ft (moderate). The air is 65°F, feeling like 59°F, with breezy 9 mph winds from the SW. The UV index reaches 3 (moderate). The National Weather Service rip current risk is low.
The water holds steady around 55°F through Sun Nov 8.
The week ahead at Nantasket Beach, day by day: the sky, the high, the strongest wind and the biggest waves, the UV peak and the daytime chance of rain, and the water temperature. The calmest day for a swim looks like Tue Nov 3.
| Day | Sky | High | Wind | Waves | UV | Rain | Water |
|---|---|---|---|---|---|---|---|
| Today | Cloudy | 71°F | 12 mph | 1.1 ft | 3 | 1% | 55°F |
| Tue Nov 3 | Cloudy | 72°F | 9 mph | 0.9 ft | 4 | 7% | 55°F |
| Wed Nov 4 | Cloudy | 72°F | 12 mph | 1 ft | 4 | 0% | 55°F |
| Thu Nov 5 | Cloudy | 72°F | 13 mph | 1.3 ft | 3 | 12% | 56°F |
| Fri Nov 6 | Showers | 66°F | 14 mph | 1.4 ft | 3 | 61% | 56°F |
| Sat Nov 7 | Showers | 63°F | 16 mph | 1.3 ft | 2 | 59% | 56°F |
| Sun Nov 8 | Cloudy | 57°F | 14 mph | 1.3 ft | 3 | 13% | 56°F |
High and low tides for the next 7 days, from NOAA’s predictions for tide station 8443970. Heights are in feet above the average low tide. The shell window is the last hour and a quarter of the ebb and the first three-quarters of the flood around the day’s lowest daylight low, when the most sand is bare; the lowest low of the week is marked.
| Day | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Shell window |
|---|---|---|---|---|---|
| Today | High 4:47 AM 9.1 | Low 10:46 AM 1.3 | High 5:03 PM 10.0 | Low 11:29 PM 0.4 | 9:31 AM–11:31 AM |
| Tue Nov 3 | High 5:53 AM 9.2 | Low 11:53 AM 1.2 | High 6:11 PM 9.7 | — | 10:38 AM–12:38 PM |
| Wed Nov 4 | Low 12:31 AM 0.5 | High 6:55 AM 9.5 | Low 12:59 PM 1.0 | High 7:18 PM 9.6 | 11:44 AM–1:44 PM |
| Thu Nov 5 | Low 1:30 AM 0.6 | High 7:53 AM 9.9 | Low 2:01 PM 0.7 | High 8:19 PM 9.6 | 12:46 PM–2:46 PM |
| Fri Nov 6 | Low 2:24 AM 0.6 | High 8:44 AM 10.2 | Low 2:57 PM 0.3 | High 9:13 PM 9.6 | 1:42 PM–3:42 PM |
| Sat Nov 7 | Low 3:13 AM 0.6 | High 9:29 AM 10.4 | Low 3:46 PM 0.0 | High 10:00 PM 9.6 | 2:31 PM–4:31 PM |
| Sun Nov 8 | Low 3:57 AM 0.7 | High 10:10 AM 10.5 | Low 4:30 PM -0.1 | High 10:44 PM 9.5 | 3:15 PM–5:15 PM · best |
The average sea temperature at Nantasket Beach for each month (2021–2024). The water is warmest in August (67°F) and coolest in February (38°F). It never averages 74°F, so most swimmers use a wetsuit.
| Month | Water °F | Water °C | For swimming |
|---|---|---|---|
| January | 40°F | 4°C | Cold |
| February | 38°F | 3°C | Cold |
| March | 40°F | 5°C | Cold |
| April | 46°F | 8°C | Cold |
| May | 56°F | 13°C | Cold |
| June | 64°F | 18°C | Chilly |
| July | 67°F | 19°C | Chilly |
| August | 67°F | 20°C | Chilly |
| September | 67°F | 19°C | Chilly |
| October | 59°F | 15°C | Cold |
| November (now) | 50°F | 10°C | Cold |
| December | 43°F | 6°C | Cold |
Rip currents. Today’s National Weather Service rip current risk is low. If a current pulls you away from shore, don’t fight it: swim parallel to the beach until you are out of it, then swim back in. If you can’t, float and wave for help.
Sun. The UV index peaks at 3 today. Wear SPF 30 and reapply every two hours and after swimming.
Dogs. Dogs are allowed right now, on a leash. Allowed until May 1.
Swim near a lifeguard when one is on duty, and follow the beach flags and posted signs. The Nantasket Beach rules page covers dogs, alcohol, fires and more.
Under 1 ft is calm, good for small children and floating. 1–2 ft is small, fine for most swimmers. 2–4 ft is moderate: fun for bodyboarding, harder for weak swimmers. 4–6 ft is rough, and over 6 ft is dangerous for swimming. Today at Nantasket Beach it’s moderate.
Under 8 mph is light and pleasant. 8–15 mph is breezy, good for kites and cooler on a hot day. 15–25 mph blows sand and whips up the water. Over 25 mph most people pack up. Today at Nantasket Beach it’s breezy.
0–2 is low, 3–5 moderate, 6–7 high, 8–10 very high and 11 or more extreme. At 8 or more, fair skin can burn in under 20 minutes. The UV index is highest around midday even when it is cloudy.
Under 60°F is cold and most people want a wetsuit. 68–73°F is cool but swimmable. 74–79°F feels comfortable, and 80°F or more feels warm.
55°F (13°C), 5°F warmer than the usual 50°F for November.
At 55°F the water is cold: most swimmers want a wetsuit. Waves are 1–2 ft, which is moderate. The rip current risk is low.
1–2 ft, which is moderate. The wind is 9 mph from the SW.
High tide is at 4:47 AM and 5:03 PM, and low tide is at 10:46 AM and 11:29 PM. Times are NOAA predictions.
The UV index peaks at 3 (moderate). Wear SPF 30 and reapply every two hours and after swimming.
The National Weather Service rates the rip current risk at Nantasket Beach low today. If a current pulls you out, swim parallel to the shore until you are out of it, then swim back in.
Highs run 57–72°F over the next 7 days. Rain is likely on Fri Nov 6 and Sat Nov 7. The calmest day for a swim looks like Tue Nov 3.
The water at Nantasket Beach averages about 50°F (10°C) in November.
August is the warmest month, averaging 67°F. February is the coolest, at 38°F.
The water never averages 74°F here. It is warmest in August, at 67°F, so bring a wetsuit most of the year.
The usual water temperature in November at the nearest beaches. Tap one for its live conditions.
| Singing Beach conditions | 20 mi | 52°F |
|---|---|---|
| Good Harbor Beach conditions | 26 mi | 52°F |
| Crane Beach conditions | 27 mi | 51°F |
| Wingaersheek Beach conditions | 27 mi | 52°F |
| Race Point Beach conditions | 36 mi | 54°F |
| Herring Cove Beach conditions | 37 mi | 54°F |
More for Nantasket Beach: parking · sunset time tonight · things to do · US water temperatures today →