Lummi Island water temp

This data the coastal Lummi Island ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current ocean temperature in Lummi Island

Water temperature in Lummi Island today is 57.9°F. Based on our historical data over a period of ten years, the warmest water in this day in Lummi Island was recorded in 2019 and was 60.1°F, and the coldest was recorded in 2007 at 53.8°F. Sea water temperature in Lummi Island is expected to drop to 56.1°F in the next 10 days. September average water temperature in Lummi Island is 55.4°F, the minimum temperature is 51.3°F, and the maximum is 60.6°F.

Throughout the year, the water temperature in Lummi Island does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in Lummi Island in winter reaches 45.7°F, in spring 48.4°F, in summer the average temperature rises to 56.1°F, and in autumn it is 51.8°F.

Lummi Island water temperature now

Surf Forecast in Lummi Island for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Lummi Island. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Lummi Island. Data in table shown for September 6, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Lummi Island

Lummi Island weather forecast

Current temperature and weather

Data in a table show Lummi Island temperature today (September 6, 2025). For more information and forecast for a few days, go to the weather forecast Lummi Island.

0-3 h	3-6 h	6-9 h	9-12 h
57.7°F	57.6°F	57°F	56.7°F

12-15 h	15-18 h	18-21 h	21-24 h
55.8°F	55.6°F	56.3°F	56.8°F

Lummi Island water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Lummi Island. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Lummi Island on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Lummi Island

The nearest beaches and cities from Lummi Island with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Friday Harbor	55.4°F	62.6°F		0' 3"
Point Roberts	62.1°F	64.4°F		0' 3"
Oak Harbor	56.5°F	62.6°F		0' 8"
Pender Island	56.8°F	66.2°F		0' 2"
Boundary Bay	65.5°F	73.4°F		0' 2"
Centennial Beach	64.2°F	64.4°F		0' 2"
Surrey	66°F	73.4°F		0' 2"
Tsawwassen	64°F	64.4°F		0' 2"
Coupeville	55.2°F	60.8°F		0' 6"
Sidney	56.1°F	66.2°F		0' 1"

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Our report for Lummi Island is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.