Updated
Semiahmoo Bay
Bay
Cool water — ease in carefully
Use cautionCool water — ease in carefully: water temperature is 68°F, cool enough to cause cold-water shock on a sudden entry.
- Water temperature is 68°F, cool enough to cause cold-water shock on a sudden entry.
- Heavy rain today can raise bacteria levels near outfalls and river mouths.
bay straddling the international border in British Columbia, Canada and Washington, United States of America
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Cool water — ease in carefully
Use cautionCool water — ease in carefully: water temperature is 68°F, cool enough to cause cold-water shock on a sudden entry.
- Water temperature is 68°F, cool enough to cause cold-water shock on a sudden entry. — NOAA buoy 46303, as of Aug 23, 10:00 PM UTC
- Heavy rain today can raise bacteria levels near outfalls and river mouths.
No official beach-advisory feed for Washington yet — follow posted signs and local guidance.
Live data from NOAA buoy 46303 (26.7 mi away), as of Aug 23, 10:00 PM UTC.
Weather at Semiahmoo Bay
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Frequently asked questions
- Where is Semiahmoo Bay?
- Semiahmoo Bay is a bay in Washington.
- What is the water temperature at Semiahmoo Bay?
- As of August 23, 2026, the water temperature at Semiahmoo Bay in Washington is 68°F (20°C), measured by NOAA buoy 46303, 26.7 miles away.
- Can you swim at Semiahmoo Bay?
- Cool water — ease in carefully: water temperature is 68°F, cool enough to cause cold-water shock on a sudden entry. Checked August 23, 2026.
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Best Times to Visit
- ›Weekday mornings (8–10 AM) are typically less crowded
- ›Check the forecast 2–3 days ahead for best planning
- ›Avoid holiday weekends for a quieter experience
Location & Contact
Washington
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