Updated
Port Jefferson Harbor
Bay
Comfortable for a swim today
Good to swimComfortable for a swim today: water temperature is 75°F, within the comfortable 70–86°F range.
- Water temperature is 75°F, within the comfortable 70–86°F range.
- Heavy rain today can raise bacteria levels near outfalls and river mouths.
bay in Suffolk County, New York, United States of America
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Comfortable for a swim today
Good to swimComfortable for a swim today: water temperature is 75°F, within the comfortable 70–86°F range.
- Water temperature is 75°F, within the comfortable 70–86°F range. — NOAA buoy BRHC3, as of Aug 22, 5:48 PM UTC
- Heavy rain today can raise bacteria levels near outfalls and river mouths.
No official beach-advisory feed for New York yet — follow posted signs and local guidance.
Live data from NOAA buoy BRHC3 (15.6 mi away), as of Aug 22, 5:48 PM UTC.
Weather at Port Jefferson Harbor
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Frequently asked questions
- Where is Port Jefferson Harbor?
- Port Jefferson Harbor is a bay in New York.
- What is the water temperature at Port Jefferson Harbor?
- As of August 22, 2026, the water temperature at Port Jefferson Harbor in New York is 75°F (24°C), measured by NOAA buoy BRHC3, 15.6 miles away.
- Can you swim at Port Jefferson Harbor?
- Comfortable for a swim today: water temperature is 75°F, within the comfortable 70–86°F range. Checked August 22, 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
New York
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