St. Johns River entrance · Harbor

Mayport

Water temperature & tides

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WATER TEMPERATURE Station observation
72.0°F
Observed

October 21, 2026 · 11:00 PM EDT

-0.2° compared with 24 hours earlier

⌾
Mayport (Bar Pilots Dock)NOAA 8720218 · harbor reading
↗

COMING UP · LOCAL TIME

↘ Next low tide11:43 PMWed, Oct 21 · 1.15 ft
↗ Next high tide6:05 AMThu, Oct 22 · 4.94 ft

Predicted heights above MLLW. Astronomical tide predictions do not include storm surge.

✓
Official weather alerts shown above. Local water-quality closures are not included. Check local beach authorities.

RECENT OBSERVATIONS

Water temperature

°F

Past 72 hours at Mayport (Bar Pilots Dock). Gaps are left visible.

Water temperature observations71.172.674.275.7Oct 18Oct 19Oct 20Oct 21Oct 21
View observation table
Local date & timeWater temperature
Oct 21 · 11:00 PM EDT72.0°F
Oct 21 · 10:54 PM EDT72.0°F
Oct 21 · 10:48 PM EDT72.0°F
Oct 21 · 10:42 PM EDT72.0°F
Oct 21 · 10:36 PM EDT72.0°F
Oct 21 · 10:30 PM EDT72.0°F
Oct 21 · 10:24 PM EDT72.0°F
Oct 21 · 10:18 PM EDT72.0°F
Oct 21 · 10:12 PM EDT72.0°F
Oct 21 · 10:06 PM EDT72.0°F
Oct 21 · 10:00 PM EDT72.0°F
Oct 21 · 9:54 PM EDT72.0°F
Oct 21 · 9:48 PM EDT72.0°F
Oct 21 · 9:42 PM EDT72.1°F
Oct 21 · 9:36 PM EDT72.1°F
Oct 21 · 9:30 PM EDT72.1°F
Oct 21 · 9:24 PM EDT72.1°F
Oct 21 · 9:18 PM EDT72.3°F
Oct 21 · 9:12 PM EDT72.3°F
Oct 21 · 9:06 PM EDT72.3°F
Oct 21 · 9:00 PM EDT72.1°F
Oct 21 · 8:54 PM EDT72.1°F
Oct 21 · 8:48 PM EDT72.1°F
Oct 21 · 8:42 PM EDT72.1°F
Oct 21 · 8:36 PM EDT72.3°F
Oct 21 · 8:30 PM EDT72.3°F
Oct 21 · 8:24 PM EDT72.3°F
Oct 21 · 8:18 PM EDT72.3°F
Oct 21 · 8:12 PM EDT72.3°F
Oct 21 · 8:06 PM EDT72.3°F
Oct 21 · 8:00 PM EDT72.3°F
Oct 21 · 7:54 PM EDT72.3°F
Oct 21 · 7:48 PM EDT72.3°F
Oct 21 · 7:42 PM EDT72.5°F
Oct 21 · 7:36 PM EDT72.5°F
Oct 21 · 7:30 PM EDT72.5°F
Oct 21 · 7:24 PM EDT72.5°F
Oct 21 · 7:18 PM EDT72.5°F
Oct 21 · 7:12 PM EDT72.5°F
Oct 21 · 7:06 PM EDT72.5°F
Oct 21 · 7:00 PM EDT72.5°F
Oct 21 · 6:54 PM EDT72.5°F
Oct 21 · 6:48 PM EDT72.5°F
Oct 21 · 6:42 PM EDT72.5°F
Oct 21 · 6:36 PM EDT72.5°F
Oct 21 · 6:30 PM EDT72.5°F
Oct 21 · 6:24 PM EDT72.5°F
Oct 21 · 6:18 PM EDT72.5°F
Oct 21 · 6:12 PM EDT72.5°F
Oct 21 · 6:06 PM EDT72.5°F
Oct 21 · 6:00 PM EDT72.5°F
Oct 21 · 5:54 PM EDT72.5°F
Oct 21 · 5:48 PM EDT72.5°F
Oct 21 · 5:42 PM EDT72.5°F
Oct 21 · 5:36 PM EDT72.5°F
Oct 21 · 5:30 PM EDT72.5°F
Oct 21 · 5:24 PM EDT72.5°F
Oct 21 · 5:18 PM EDT72.5°F
Oct 21 · 5:12 PM EDT72.5°F
Oct 21 · 5:06 PM EDT72.5°F
Oct 21 · 5:00 PM EDT72.5°F
Oct 21 · 4:54 PM EDT72.5°F
Oct 21 · 4:48 PM EDT72.5°F
Oct 21 · 4:42 PM EDT72.5°F
Oct 21 · 4:36 PM EDT72.5°F
Oct 21 · 4:30 PM EDT72.5°F
Oct 21 · 4:24 PM EDT72.5°F
Oct 21 · 4:18 PM EDT72.5°F
Oct 21 · 4:12 PM EDT72.5°F
Oct 21 · 4:06 PM EDT72.5°F
Oct 21 · 4:00 PM EDT72.5°F
Oct 21 · 3:54 PM EDT72.5°F
Oct 21 · 3:48 PM EDT72.5°F
Oct 21 · 3:42 PM EDT72.5°F
Oct 21 · 3:36 PM EDT72.5°F
Oct 21 · 3:30 PM EDT72.5°F
Oct 21 · 3:24 PM EDT72.5°F
Oct 21 · 3:18 PM EDT72.5°F
Oct 21 · 3:12 PM EDT72.5°F
Oct 21 · 3:06 PM EDT72.5°F
Oct 21 · 3:00 PM EDT72.7°F
Oct 21 · 2:54 PM EDT72.5°F
Oct 21 · 2:48 PM EDT72.5°F
Oct 21 · 2:42 PM EDT72.5°F
Oct 21 · 2:36 PM EDT72.5°F
Oct 21 · 2:30 PM EDT72.5°F
Oct 21 · 2:24 PM EDT72.5°F
Oct 21 · 2:18 PM EDT72.5°F
Oct 21 · 2:12 PM EDT72.3°F
Oct 21 · 2:06 PM EDT72.3°F
Oct 21 · 2:00 PM EDT72.3°F
Oct 21 · 1:54 PM EDT72.3°F
Oct 21 · 1:48 PM EDT72.3°F
Oct 21 · 1:42 PM EDT72.3°F
Oct 21 · 1:36 PM EDT72.3°F
Oct 21 · 1:30 PM EDT72.3°F
Oct 21 · 1:24 PM EDT72.3°F
Oct 21 · 1:18 PM EDT72.3°F
Oct 21 · 1:12 PM EDT72.3°F
Oct 21 · 1:06 PM EDT72.5°F
Oct 21 · 1:00 PM EDT72.1°F
Oct 21 · 12:54 PM EDT72.1°F
Oct 21 · 12:48 PM EDT72.1°F
Oct 21 · 12:42 PM EDT72.1°F
Oct 21 · 12:36 PM EDT72.1°F
Oct 21 · 12:30 PM EDT72.1°F
Oct 21 · 12:24 PM EDT72.0°F
Oct 21 · 12:18 PM EDT72.0°F
Oct 21 · 12:12 PM EDT72.0°F
Oct 21 · 12:06 PM EDT72.0°F
Oct 21 · 12:00 PM EDT72.0°F
Oct 21 · 11:54 AM EDT72.0°F
Oct 21 · 11:48 AM EDT71.8°F
Oct 21 · 11:42 AM EDT71.8°F
Oct 21 · 11:36 AM EDT71.8°F
Oct 21 · 11:30 AM EDT71.8°F
Oct 21 · 11:24 AM EDT71.8°F
Oct 21 · 11:18 AM EDT71.8°F
Oct 21 · 11:12 AM EDT71.8°F
Oct 21 · 11:06 AM EDT71.8°F

Latest 120 observations shown in this table.

OFFICIAL ASTRONOMICAL PREDICTIONS

Tides for October 21

ft MLLW
Predicted tide heights above MLLW0.42.24.05.812 AM6 AM12 PM6 PM12 AMNow
NOAA prediction DaylightTimes in America/New_York
DateEventLocal timeHeight
Wed, Oct 21↗ High5:13 AM EDT4.65 ft
↘ Low11:07 AM EDT1.39 ft
↗ High5:44 PM EDT5.00 ft
↘ Low11:43 PM EDT1.15 ft
Thu, Oct 22↗ High6:05 AM EDT4.94 ft
↘ Low12:00 PM EDT1.19 ft
↗ High6:31 PM EDT5.13 ft
Fri, Oct 23↘ Low12:25 AM EDT0.88 ft
↗ High6:53 AM EDT5.28 ft
↘ Low12:50 PM EDT0.96 ft
↗ High7:16 PM EDT5.24 ft
Sat, Oct 24↘ Low1:07 AM EDT0.61 ft
↗ High7:39 AM EDT5.60 ft
↘ Low1:38 PM EDT0.74 ft
↗ High8:00 PM EDT5.31 ft
Sun, Oct 25↘ Low1:49 AM EDT0.37 ft
↗ High8:24 AM EDT5.88 ft
↘ Low2:25 PM EDT0.56 ft
↗ High8:46 PM EDT5.32 ft
Mon, Oct 26↘ Low2:30 AM EDT0.18 ft
↗ High9:10 AM EDT6.08 ft
↘ Low3:11 PM EDT0.46 ft
↗ High9:32 PM EDT5.28 ft
Tue, Oct 27↘ Low3:13 AM EDT0.10 ft
↗ High9:58 AM EDT6.18 ft
↘ Low3:59 PM EDT0.45 ft
↗ High10:21 PM EDT5.20 ft
Download 30-day CSV ↓

A LITTLE LONGER VIEW

Seasonal water temperatures

NOAA station observations · 2021–2025 baseline. Each published month has at least three qualifying years.

MonthMean10th–90th percentileYears used
Jan58.8°F54.9°F – 62.1°F2021, 2022, 2023, 2024, 2025
Feb59.6°F56.5°F – 63.1°F2021, 2022, 2023, 2024, 2025
Mar64.2°F59.9°F – 68.4°F2021, 2023, 2024, 2025
Apr70.5°F66.2°F – 74.5°F2021, 2023, 2024, 2025
May77.0°F73.0°F – 80.8°F2021, 2023, 2024, 2025
Jun81.4°F77.4°F – 84.9°F2021, 2022, 2023, 2024, 2025
Jul83.3°F79.3°F – 86.4°F2021, 2022, 2023, 2024, 2025
Aug84.3°F82.0°F – 86.5°F2021, 2022, 2023, 2024, 2025
Sep82.5°F80.2°F – 84.6°F2021, 2022, 2023, 2024, 2025
Oct76.2°F72.1°F – 81.5°F2021, 2022, 2023, 2024, 2025
Nov69.2°F64.4°F – 74.5°F2021, 2022, 2023, 2024, 2025
Dec62.7°F58.6°F – 66.0°F2021, 2022, 2023, 2024, 2025

Hourly UTC observations, at least 70% coverage per station-month-year and at least three qualifying years per calendar month; 10th–90th percentiles of qualifying hourly observations.

BEHIND THE NUMBER

Know where your reading comes from.

A Mayport station observation at the St. Johns River entrance. River and exposed-ocean conditions can differ.

Monitoring station
Mayport (Bar Pilots Dock) · NOAA 8720218
Coordinates
30.39817, -81.42789
Water body
St. Johns River entrance
Source relationship
Official NOAA station location; observation applies to the named sensor.
Last successful collection
Oct 21, 2026 · 11:10 PM EDT
Tide reference
MLLW · Mean Lower Low Water

To report an issue, include the station ID, observation time and source link when contacting the site operator. Read our methodology.

A LITTLE FARTHER ALONG

Nearby stations to compare

Compare these places ↗
Florida · Coast

Clearwater Beach

Gulf of Mexico

74.7°F-0.2° vs 24h ago
Clearwater Beach temperature over the last 48 hours
Next low tide3:38 AMThu · 1.24 ft MLLW
Observed
Florida · Coast

Panama City Beach

Gulf of Mexico

76.5°F-0.4° vs 24h ago
Panama City Beach temperature over the last 48 hours
Next low tide11:13 PMWed · 0.97 ft MLLW
Observed
Florida · Island

Virginia Key

Biscayne Bay

81.1°F-0.5° vs 24h ago
Virginia Key temperature over the last 48 hours
Next low tide12:15 AMThu · 0.79 ft MLLW
Observed
Florida · Island

Key West

Florida Straits

82.0°F-0.5° vs 24h ago
Key West temperature over the last 48 hours
Next low tide1:15 AMThu · 0.96 ft MLLW
Observed