Portland, Maine Ocean Temperature And Station 8418150
NOAA CO-OPS station 8418150 is the Portland Harbor reference and its current sensor inventory includes water temperature. Read every observation with its station and timestamp, and do not extend one harbor measurement to beaches, surf zones or the wider Gulf of Maine.
- Official station reference
- NOAA CO-OPS station 8418150 at Portland, Maine.
- Water-temperature source
- The current official sensor inventory lists a water-temperature instrument at station 8418150.
- Exact-water boundary
- A Portland Harbor observation does not represent every beach, surf zone or offshore Gulf of Maine location.
- Tide boundary
- Predicted tide height, observed water level, water temperature and tidal current are separate measurements or products.
- Freshness boundary
- Use the station identifier and observation time; never treat an old value as the current ocean temperature.
- Next measurement
- Recheck the target query and close variants on 2026-08-15.
Start With Portland Station 8418150
NOAA identifies 8418150 as the Portland, Maine station and lists water temperature among its current instruments. Use that station ID to separate Portland Harbor observations from nearby buoys, beaches and open-ocean sources.
Use the station-scoped value while learning how water temperature fits fishing conditions.
Read The Observation Time With The Temperature
A water-temperature observation is a measured value from a specific place and time. Check the latest official station page before acting, especially when a cached card or search result does not expose its observation time. Do not substitute air temperature or a different buoy for a missing harbor reading.
Keep Portland Harbor Separate From The Wider Coast
Station 8418150 describes its instrument location in Portland Harbor. Beaches, shallow coves, river-influenced water and offshore Gulf of Maine sites can differ. A single station reading should not be labeled as the temperature of the entire Maine coast.
Separate Tide Predictions From Observed Water
NOAA tide tables provide predicted high and low times and heights. A water-temperature observation and a measured water level are different products, and neither should be described as slack current. Keep the date, time zone, units and vertical datum attached to any tide value you compare.
Use Datums As Height References
NOAA publishes station-specific vertical datums such as MLLW, MSL and MHHW for 8418150. A datum is the reference for a reported water-level height; it is not water depth, temperature, current speed or a navigation clearance.
Combine Temperature With A Current Trip Check
Water temperature is one planning signal. Recheck tide or water level, wind, marine weather, active alerts, safe access and the exact saved water before departure. No station value guarantees fishing success or safe conditions.
For the tide interpretation step, use how to read tide chart signals.
Common questions
Which station reports water temperature for Portland, Maine?
NOAA CO-OPS station 8418150 is the Portland Harbor reference, and its current official sensor inventory includes water temperature.
Is the Portland Harbor temperature the same as every nearby beach?
No. The observation belongs to the station location and time. Beach, cove, river-influenced and offshore waters can differ.
Is a tide prediction a live water-level observation?
No. A tide prediction is an astronomical estimate, while an observation is a time-stamped measurement. Check the product label before comparing them.
Does high tide mean slack current in Portland Harbor?
Not necessarily. High water and tidal-current timing are different products, and slack current can occur at a different time.
What should I recheck before using a Portland ocean-temperature value?
Recheck the station ID, observation time, units, official forecast and alerts, and whether Portland Harbor represents the exact water you plan to visit.