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San Diego Bay · Bay

San Diego Bay

Water temperature & tides

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WATER TEMPERATURE Station observation
74.7°F
Observed

October 21, 2026 · 8:00 PM PDT

Above usual October range

10th–90th percentile: 66.0°F – 69.8°F · 2021–2025.

Seasonal context, not a failed sensor quality check. Compared with hourly observations in the same UTC calendar month.

+0.0° compared with 24 hours earlier

⌾
San DiegoNOAA 9410170 · bay reading
↗

COMING UP · LOCAL TIME

↘ Next low tide1:11 AMThu, Oct 22 · 0.67 ft
↗ Next high tide7:34 AMThu, Oct 22 · 5.33 ft

Signed heights relative to MLLW; negative values are below the datum. Astronomical tide predictions do not include storm surge.

✓
No active NWS weather alerts reported at this station. Local water-quality closures are not included. Check local beach authorities.

RECENT OBSERVATIONS

Water temperature

°F

Past 72 hours at San Diego. Gaps are left visible.

Water temperature observations73.274.275.176.1Oct 18Oct 19Oct 20Oct 21Oct 21
View observation table
Local date & timeWater temperature
Oct 21 · 8:00 PM PDT74.7°F
Oct 21 · 7:54 PM PDT74.7°F
Oct 21 · 7:48 PM PDT74.7°F
Oct 21 · 7:42 PM PDT74.7°F
Oct 21 · 7:36 PM PDT74.7°F
Oct 21 · 7:30 PM PDT74.7°F
Oct 21 · 7:24 PM PDT74.7°F
Oct 21 · 7:18 PM PDT74.7°F
Oct 21 · 7:12 PM PDT74.7°F
Oct 21 · 7:06 PM PDT74.7°F
Oct 21 · 7:00 PM PDT74.7°F
Oct 21 · 6:54 PM PDT74.7°F
Oct 21 · 6:48 PM PDT74.8°F
Oct 21 · 6:42 PM PDT74.8°F
Oct 21 · 6:36 PM PDT74.8°F
Oct 21 · 6:30 PM PDT74.8°F
Oct 21 · 6:24 PM PDT74.8°F
Oct 21 · 6:18 PM PDT74.8°F
Oct 21 · 6:12 PM PDT74.8°F
Oct 21 · 6:06 PM PDT74.8°F
Oct 21 · 6:00 PM PDT74.8°F
Oct 21 · 5:54 PM PDT74.8°F
Oct 21 · 5:48 PM PDT74.8°F
Oct 21 · 5:42 PM PDT74.8°F
Oct 21 · 5:36 PM PDT74.8°F
Oct 21 · 5:30 PM PDT74.7°F
Oct 21 · 5:24 PM PDT74.7°F
Oct 21 · 5:18 PM PDT74.7°F
Oct 21 · 5:12 PM PDT74.7°F
Oct 21 · 5:06 PM PDT74.7°F
Oct 21 · 5:00 PM PDT74.7°F
Oct 21 · 4:54 PM PDT74.7°F
Oct 21 · 4:48 PM PDT74.7°F
Oct 21 · 4:42 PM PDT74.7°F
Oct 21 · 4:36 PM PDT74.7°F
Oct 21 · 4:30 PM PDT74.5°F
Oct 21 · 4:24 PM PDT74.5°F
Oct 21 · 4:18 PM PDT74.5°F
Oct 21 · 4:12 PM PDT74.5°F
Oct 21 · 4:06 PM PDT74.5°F
Oct 21 · 4:00 PM PDT74.5°F
Oct 21 · 3:54 PM PDT74.5°F
Oct 21 · 3:48 PM PDT74.5°F
Oct 21 · 3:42 PM PDT74.5°F
Oct 21 · 3:36 PM PDT74.5°F
Oct 21 · 3:30 PM PDT74.5°F
Oct 21 · 3:24 PM PDT74.5°F
Oct 21 · 3:18 PM PDT74.5°F
Oct 21 · 3:12 PM PDT74.5°F
Oct 21 · 3:06 PM PDT74.5°F
Oct 21 · 3:00 PM PDT74.5°F
Oct 21 · 2:54 PM PDT74.5°F
Oct 21 · 2:48 PM PDT74.3°F
Oct 21 · 2:42 PM PDT74.3°F
Oct 21 · 2:36 PM PDT74.3°F
Oct 21 · 2:30 PM PDT74.3°F
Oct 21 · 2:24 PM PDT74.3°F
Oct 21 · 2:18 PM PDT74.3°F
Oct 21 · 2:12 PM PDT74.3°F
Oct 21 · 2:06 PM PDT74.3°F
Oct 21 · 2:00 PM PDT74.5°F
Oct 21 · 1:54 PM PDT74.5°F
Oct 21 · 1:48 PM PDT74.5°F
Oct 21 · 1:42 PM PDT74.5°F
Oct 21 · 1:36 PM PDT74.3°F
Oct 21 · 1:30 PM PDT74.5°F
Oct 21 · 1:24 PM PDT74.5°F
Oct 21 · 1:18 PM PDT74.3°F
Oct 21 · 1:12 PM PDT74.3°F
Oct 21 · 1:06 PM PDT74.3°F
Oct 21 · 1:00 PM PDT74.3°F
Oct 21 · 12:54 PM PDT74.3°F
Oct 21 · 12:48 PM PDT74.3°F
Oct 21 · 12:42 PM PDT74.3°F
Oct 21 · 12:36 PM PDT74.3°F
Oct 21 · 12:30 PM PDT74.3°F
Oct 21 · 12:24 PM PDT74.3°F
Oct 21 · 12:18 PM PDT74.3°F
Oct 21 · 12:12 PM PDT74.1°F
Oct 21 · 12:06 PM PDT74.1°F
Oct 21 · 12:00 PM PDT74.1°F
Oct 21 · 11:54 AM PDT74.1°F
Oct 21 · 11:48 AM PDT74.1°F
Oct 21 · 11:42 AM PDT74.1°F
Oct 21 · 11:36 AM PDT74.1°F
Oct 21 · 11:30 AM PDT74.1°F
Oct 21 · 11:24 AM PDT74.1°F
Oct 21 · 11:18 AM PDT74.1°F
Oct 21 · 11:12 AM PDT74.1°F
Oct 21 · 11:06 AM PDT74.1°F
Oct 21 · 11:00 AM PDT74.1°F
Oct 21 · 10:54 AM PDT74.1°F
Oct 21 · 10:48 AM PDT74.1°F
Oct 21 · 10:42 AM PDT74.1°F
Oct 21 · 10:36 AM PDT74.1°F
Oct 21 · 10:30 AM PDT74.1°F
Oct 21 · 10:24 AM PDT74.1°F
Oct 21 · 10:18 AM PDT74.3°F
Oct 21 · 10:12 AM PDT74.3°F
Oct 21 · 10:06 AM PDT74.3°F
Oct 21 · 10:00 AM PDT74.3°F
Oct 21 · 9:54 AM PDT74.3°F
Oct 21 · 9:48 AM PDT74.3°F
Oct 21 · 9:42 AM PDT74.3°F
Oct 21 · 9:36 AM PDT74.3°F
Oct 21 · 9:30 AM PDT74.3°F
Oct 21 · 9:24 AM PDT74.3°F
Oct 21 · 9:18 AM PDT74.3°F
Oct 21 · 9:12 AM PDT74.3°F
Oct 21 · 9:06 AM PDT74.3°F
Oct 21 · 9:00 AM PDT74.3°F
Oct 21 · 8:54 AM PDT74.3°F
Oct 21 · 8:48 AM PDT74.3°F
Oct 21 · 8:42 AM PDT74.3°F
Oct 21 · 8:36 AM PDT74.1°F
Oct 21 · 8:30 AM PDT74.1°F
Oct 21 · 8:24 AM PDT74.1°F
Oct 21 · 8:18 AM PDT74.1°F
Oct 21 · 8:12 AM PDT74.1°F
Oct 21 · 8:06 AM PDT74.1°F

Latest 120 observations shown in this table.

OFFICIAL ASTRONOMICAL PREDICTIONS

Tides for October 21

ft MLLW
Predicted tide heights relative to MLLW-0.11.83.85.812 AM6 AM12 PM6 PM12 AMNow
NOAA prediction DaylightTimes in America/Los_Angeles
DateEventLocal timeHeight
Wed, Oct 21↘ Low12:43 AM PDT0.71 ft
↗ High7:16 AM PDT4.88 ft
↘ Low1:00 PM PDT2.13 ft
↗ High6:46 PM PDT4.98 ft
Thu, Oct 22↘ Low1:11 AM PDT0.67 ft
↗ High7:34 AM PDT5.33 ft
↘ Low1:36 PM PDT1.45 ft
↗ High7:29 PM PDT5.11 ft
Fri, Oct 23↘ Low1:39 AM PDT0.73 ft
↗ High7:56 AM PDT5.81 ft
↘ Low2:13 PM PDT0.77 ft
↗ High8:11 PM PDT5.15 ft
Sat, Oct 24↘ Low2:06 AM PDT0.88 ft
↗ High8:20 AM PDT6.27 ft
↘ Low2:51 PM PDT0.15 ft
↗ High8:54 PM PDT5.08 ft
Sun, Oct 25↘ Low2:34 AM PDT1.12 ft
↗ High8:48 AM PDT6.68 ft
↘ Low3:31 PM PDT-0.35 ft
↗ High9:38 PM PDT4.89 ft
Mon, Oct 26↘ Low3:03 AM PDT1.42 ft
↗ High9:18 AM PDT6.97 ft
↘ Low4:13 PM PDT-0.67 ft
↗ High10:25 PM PDT4.59 ft
Tue, Oct 27↘ Low3:33 AM PDT1.77 ft
↗ High9:51 AM PDT7.10 ft
↘ Low5:00 PM PDT-0.78 ft
↗ High11:19 PM PDT4.22 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
Jan58.9°F57.4°F – 60.3°F2021, 2022, 2023, 2024, 2025
Feb59.5°F57.6°F – 61.0°F2021, 2022, 2023, 2024, 2025
Mar61.0°F58.6°F – 63.3°F2021, 2022, 2023, 2024, 2025
Apr62.9°F60.1°F – 65.3°F2021, 2022, 2023, 2024, 2025
May65.8°F63.7°F – 67.8°F2021, 2022, 2023, 2024, 2025
Jun68.7°F65.5°F – 72.0°F2021, 2022, 2023, 2024, 2025
Jul70.9°F68.0°F – 73.6°F2021, 2022, 2023, 2024, 2025
Aug71.9°F68.5°F – 75.0°F2021, 2022, 2023, 2024, 2025
Sep71.5°F68.7°F – 74.3°F2021, 2022, 2023, 2024, 2025
Oct68.1°F66.0°F – 69.8°F2021, 2022, 2023, 2024, 2025
Nov64.5°F62.1°F – 66.6°F2021, 2022, 2023, 2024, 2025
Dec61.3°F59.0°F – 63.3°F2021, 2022, 2023, 2024, 2025

All 12 months are shown. “Insufficient data” means fewer than three years meet 70% hourly coverage for that calendar month. Winter months use the same coverage rules; they are not deliberately excluded.

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.

This station measures conditions inside San Diego Bay. Compare La Jolla for a separate exposed-coast observation.

Monitoring station
San Diego · NOAA 9410170
Coordinates
32.71556, -117.17667
Water body
San Diego Bay
Source relationship
Official NOAA station location; observation applies to the named sensor.
Last successful collection
Oct 21, 2026 · 8:10 PM PDT
Tide reference
MLLW · Mean Lower Low Water
Official NOAA station ↗View station on map ↗View data JSON ↗

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 ↗
California · Pier

La Jolla

Pacific Ocean

72.9°F+0.0° vs 24h ago
Above usual October range
La Jolla temperature over the last 48 hours
Next low tide1:09 AMThu · 0.60 ft MLLW
Observed
California · Harbor

Los Angeles Harbor

Los Angeles Harbor

—°F
More observations are needed to draw this chart.
Next low tide1:15 AMThu · 0.64 ft MLLW
No current reading
California · Pier

Santa Monica

Santa Monica Bay

72.1°F-0.7° vs 24h ago
Above usual October range
Santa Monica temperature over the last 48 hours
Next low tide1:18 AMThu · 0.62 ft MLLW
Observed
California · Harbor

Port San Luis

San Luis Obispo Bay

66.9°F+0.4° vs 24h ago
Above usual October range
Port San Luis temperature over the last 48 hours
Next low tide1:50 AMThu · 0.78 ft MLLW
Observed