Boat or Nope

NOAA NDBC 44020

Nantucket Harbor water temperature

Latest water temperature and buoy observations for Nantucket Harbor from NDBC station Nantucket Sound (44020).

Latest report

61.3°F

61.3°F is cool. Many boaters still dress as if they might end up in the water.

Water
61.3 °F
Wind
23 kt (26.5 mph)
Gust
31 kt
Seas
2 ft
Observed
Oct 17, 5:50 AM EDT

Wind at 23 knots is Beaufort force 6, Strong breeze. Small-craft-advisory weather on many coasts. Most recreational boats treat this as a stay-in day. Beaufort scale · Knots to mph

Source and freshness

Retrieved from the NOAA NDBC realtime 2 file. A fresh copy is reused for about 2 minutes, and a recent copy can stand in for up to 30 minutes if the feed blips. Retrieved Oct 17, 6:50 AM EDT.

NDBC station 44020 · Realtime file

This buoy is also the observation station for Bass River, Chatham, Edgartown Harbor, Falmouth Harbor, Fiddlers Cove, Green Pond Harbor, Hyannis Harbor, Madaket Harbor.

Check the boat day

Go / No-Go for Nantucket HarborThe full harbor call, with this buoy in the source list.Forecast widgetEmbed the harbor forecast on another site.Nantucket Harbor tide chartCO-OPS 8449130 highs and lows.

Water temperature questions

Where does the Nantucket Harbor water temperature come from?

Water temperature, wind, and seas on this page come from the NOAA NDBC realtime feed for station 44020 (Nantucket Sound). That is the same buoy file the Nantucket Harbor harbor page already requests. This page does not add a separate CO-OPS water-temperature product.

How fresh is the buoy reading?

The page shows the observation time from the NDBC report and the time Boat or Nope retrieved the file. The realtime file is cached for about 2 minutes when fresh, and a recent copy can be reused for up to 30 minutes if NDBC is briefly unavailable.

Why might the beach feel different from this temperature?

A buoy can sit offshore of the harbor, and shallow water warms and cools faster than the sensor. The station name and distance, when Boat or Nope has one, say how far the reading is from the harbor.

What does a cold reading mean for boating?

Water under 60°F can cause cold shock if someone falls in. The note on this page is general context. It is not a life-jacket or wetsuit rule for your boat.