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NOAA NDBC GRMM4

Grand Marais, MI water temperature

Latest water temperature and buoy observations for Grand Marais, MI from NDBC station Grand Marais, MI (GRMM4).

See today's Boat or Nope call for Grand Marais, MI

Latest report

Water temperature unavailable

This station's latest report did not include a water temperature.

Water
Not in this report
Wind
6 kt (6.9 mph)
Gust
7 kt
Seas
ft
Observed
Oct 22, 6:50 PM EDT

Wind at 6 knots is Beaufort force 2, Light breeze. Comfortable for almost any recreational boat. 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 22, 7:23 PM EDT.

NDBC station GRMM4 · Realtime file

Check the boat day

Go / No-Go for Grand Marais, MIThe full harbor call, with this buoy in the source list.Forecast widgetEmbed the harbor forecast on another site.

Nearby water temperature stations

Grand Island North, MI (268)Michigan · Grand Island North, MI (268) · 30.0 nmMunising Lake Shore, MIMichigan · Munising Lake Shore, MI · 32.3 nmNaubinway, MIMichigan · Naubinway, MI · 42.0 nm9087096 - Port Inland, MIMichigan · 9087096 - Port Inland, MI · 43.2 nm9099004 - Point Iroquois, MIMichigan · 9099004 - Point Iroquois, MI · 56.6 nm9099018 - Marquette C.G., MIMichigan · 9099018 - Marquette C.G., MI · 58.6 nm

Water temperature questions

Where does the Grand Marais, MI water temperature come from?

Water temperature, wind, and seas on this page come from the NOAA NDBC realtime feed for station GRMM4 (Grand Marais, MI). That is the same buoy file the Grand Marais, MI 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.