Updated
Sunset Bay Park on Grassy Key
Park · Marathon, Florida
Warm water — comfortable, stay sun-safe
Good to swimWarm water — comfortable, stay sun-safe: water temperature is 91°F, warm enough that sun and heat are the main concerns.
- Water temperature is 91°F, warm enough that sun and heat are the main concerns.
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Warm water — comfortable, stay sun-safe
Good to swimWarm water — comfortable, stay sun-safe: water temperature is 91°F, warm enough that sun and heat are the main concerns.
- Water temperature is 91°F, warm enough that sun and heat are the main concerns. — NOAA buoy VCAF1, as of Aug 23, 12:30 PM UTC
No official beach-advisory feed for Florida yet — follow posted signs and local guidance.
Live data from NOAA buoy VCAF1 (9.4 mi away), as of Aug 23, 12:30 PM UTC.
Weather at Sunset Bay Park on Grassy Key
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Frequently asked questions
- Where is Sunset Bay Park on Grassy Key?
- Sunset Bay Park on Grassy Key is a park in Marathon, Florida.
- What is the water temperature at Sunset Bay Park on Grassy Key?
- As of August 23, 2026, the water temperature at Sunset Bay Park on Grassy Key in Marathon, Florida is 91°F (33°C), measured by NOAA buoy VCAF1, 9.4 miles away.
- Can you swim at Sunset Bay Park on Grassy Key?
- Warm water — comfortable, stay sun-safe: water temperature is 91°F, warm enough that sun and heat are the main concerns. Checked August 23, 2026.
- How is Sunset Bay Park on Grassy Key rated?
- Sunset Bay Park on Grassy Key in Marathon, Florida has an average visitor rating of 4.2 out of 5, based on 144 reviews.
- What amenities does Sunset Bay Park on Grassy Key have?
- Visitor-listed amenities at Sunset Bay Park on Grassy Key include camping-nearby.
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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
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