California · Bay
Monterey
Monterey Bay
66.2°F-0.4° vs 24h ago
Above usual October range
Next low tide2:13 AMThu · 0.76 ft MLLW
Observed
San Francisco Bay · Bay
San Francisco Bay
Water temperature & tides
WATER TEMPERATURE Station observation
—°F
10th–90th percentile: —°F – —°F.
Seasonal context, not a failed sensor quality check. Compared with hourly observations in the same UTC calendar month.
Last available observation
57.9°F ·
Historical reading, over 24 hours old. It is excluded from current temperatures and comparisons.
COMING UP · LOCAL TIME
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
Past 72 hours at San Francisco. Gaps are left visible.
More observations are needed to draw this chart.
View observation table
| Local date & time | Water temperature |
|---|
Latest 120 observations shown in this table.
OFFICIAL ASTRONOMICAL PREDICTIONS
Tides for October 21
NOAA prediction DaylightTimes in America/Los_Angeles
| Date | Event | Local time | Height |
|---|---|---|---|
| Wed, Oct 21 | ↘ Low | 2:20 AM PDT | 0.64 ft |
| ↗ High | 9:23 AM PDT | 4.96 ft | |
| ↘ Low | 3:04 PM PDT | 2.12 ft | |
| ↗ High | 8:46 PM PDT | 4.75 ft | |
| Thu, Oct 22 | ↘ Low | 2:58 AM PDT | 0.74 ft |
| ↗ High | 9:47 AM PDT | 5.25 ft | |
| ↘ Low | 3:41 PM PDT | 1.51 ft | |
| ↗ High | 9:43 PM PDT | 4.84 ft | |
| Fri, Oct 23 | ↘ Low | 3:34 AM PDT | 0.95 ft |
| ↗ High | 10:12 AM PDT | 5.58 ft | |
| ↘ Low | 4:18 PM PDT | 0.86 ft | |
| ↗ High | 10:37 PM PDT | 4.92 ft | |
| Sat, Oct 24 | ↘ Low | 4:09 AM PDT | 1.26 ft |
| ↗ High | 10:39 AM PDT | 5.91 ft | |
| ↘ Low | 4:55 PM PDT | 0.23 ft | |
| ↗ High | 11:31 PM PDT | 4.98 ft | |
| Sun, Oct 25 | ↘ Low | 4:44 AM PDT | 1.65 ft |
| ↗ High | 11:07 AM PDT | 6.23 ft | |
| ↘ Low | 5:34 PM PDT | -0.34 ft | |
| Mon, Oct 26 | ↗ High | 12:25 AM PDT | 4.99 ft |
| ↘ Low | 5:21 AM PDT | 2.08 ft | |
| ↗ High | 11:39 AM PDT | 6.49 ft | |
| ↘ Low | 6:17 PM PDT | -0.78 ft | |
| Tue, Oct 27 | ↗ High | 1:21 AM PDT | 4.95 ft |
| ↘ Low | 6:01 AM PDT | 2.49 ft | |
| ↗ High | 12:15 PM PDT | 6.65 ft | |
| ↘ Low | 7:02 PM PDT | -1.04 ft |
A LITTLE LONGER VIEW
Seasonal water temperatures
NOAA station observations · 2021–2025 baseline. Each published month has at least three qualifying years.
| Month | Mean | 10th–90th percentile | Years used |
|---|---|---|---|
| Jan | 53.7°F | 52.2°F – 55.6°F | 2021, 2022, 2023 |
| Feb | Insufficient data | ||
| Mar | 54.1°F | 52.9°F – 55.6°F | 2021, 2022, 2023 |
| Apr | 55.6°F | 54.1°F – 57.4°F | 2021, 2022, 2023 |
| May | 57.3°F | 55.0°F – 60.3°F | 2021, 2022, 2023 |
| Jun | 59.8°F | 57.6°F – 62.2°F | 2021, 2022, 2023 |
| Jul | 61.2°F | 59.4°F – 63.0°F | 2021, 2022, 2023 |
| Aug | 63.6°F | 61.3°F – 65.7°F | 2021, 2022, 2023 |
| Sep | 64.8°F | 63.1°F – 66.2°F | 2021, 2022, 2023 |
| Oct | 63.8°F | 61.3°F – 65.8°F | 2021, 2022, 2023 |
| Nov | Insufficient data | ||
| Dec | 55.4°F | 52.7°F – 58.8°F | 2021, 2022, 2023 |
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.
A San Francisco station observation. Bay and open-Pacific conditions are distinct; this is not an Ocean Beach thermometer.
- Monitoring station
- San Francisco · NOAA 9414290
- Coordinates
- 37.80631, -122.46589
- Water body
- San Francisco Bay
- Source relationship
- Official NOAA station location; observation applies to the named sensor.
- Last successful collection
- No successful temperature collection yet
- 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
California · Harbor
Port San Luis
San Luis Obispo Bay
66.9°F+0.4° vs 24h ago
Above usual October range
Next low tide1:50 AMThu · 0.78 ft MLLW
Observed
California · Pier
Santa Monica
Santa Monica Bay
72.1°F-0.7° vs 24h ago
Above usual October range
Next low tide1:18 AMThu · 0.62 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