NDBC buoy, Maine

8418150 - Portland Buoy CASM1

Name: NDBC buoy CASM1 latest observation
Creator: Tide & Temp
License: https://creativecommons.org/publicdomain/zero/1.0/

Water 54.5 F as of 08:48 UTC, Sunday, October 18, 2026.

Water temperature at NDBC buoy CASM1 (8418150 - Portland, ME) is 54.5 F (12.5 C), observed 08:48 UTC on October 18, 2026.
Air temperature at the buoy is 36 F, cooler than the water.
The nearest NOAA tide station is Portland, 0.2 mi away.

Water

54.5 F

12.5 C

Air

36 F

2.4 C

Wind

3 kt

from 270 deg

Pressure

1031 hPa

sea level

Position 43.656, -70.246 · Water Level Observation Network · owner code O. Latest observation from NDBC station CASM1; this site refreshes once a day, the buoy reports hourly.

Nearby tide stations

Portland0.2 mi
Back Cove1.5 mi
Presumpscot River Bridge2.1 mi
Fore River2.2 mi
Peak Island2.3 mi

All Maine water temperatures