Fremont — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Fremont (California, United States). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Fremont help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Fremont in the Pacific Ocean today is 20°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Fremont rose over the last 30 days but fell over the last week. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Fremont will be 17.2°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 4 | 19.8°C | 15.0°C | |
| JUN 5 | 19.9°C | 16.0°C | |
| JUN 6 | 19.1°C | 15.5°C | |
| JUN 7 | 20.4°C | 15.3°C | |
| JUN 8 | 20.2°C | 13.8°C | |
| JUN 9 | 19.2°C | 15.0°C | |
| JUN 10 | 19.4°C | 15.3°C | |
| JUN 11 | 18.6°C | 15.3°C | |
| JUN 12 | 20.3°C | 15.3°C | 20.3°C |
| JUN 13 | 14.0°C | 19.9°C | |
| JUN 14 | 14.3°C | 19.4°C | |
| JUN 15 | 14.3°C | 19.0°C | |
| JUN 16 | 14.0°C | 18.5°C | |
| JUN 17 | 14.0°C | 18.1°C | |
| JUN 18 | 14.3°C | 17.6°C | |
| JUN 19 | 14.3°C | 17.2°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Fremont sits on the southern shore of San Francisco Bay and includes a mix of tidal marshes, creeks and several inland lakes and reservoirs. Water temperatures vary considerably by type of waterbody and season. Open bay water near Fremont is cool throughout the year, typically ranging from about 9°C in the coldest months to roughly 12–16°C in late summer. Shallow freshwater bodies and quarry lakes inside the city warm more in summer and can reach roughly 18–25°C on warm afternoons, while cooling to the single digits or low teens (around 8–15°C) in winter and after heavy rains. Seasonal variation is influenced by tides, local runoff and depth: deeper, connected bay waters stay colder and more stable, while sheltered, shallower ponds heat up and cool down more quickly.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 10°C | 12°C | 15°C |
| February | 10°C | 12°C | 14°C |
| March | 10°C | 13°C | 15°C |
| April | 10°C | 13°C | 17°C |
| May | 10°C | 14°C | 18°C |
| June | 9°C | 14°C | 18°C |
| July | 12°C | 15°C | 18°C |
| August | 12°C | 16°C | 19°C |
| September | 13°C | 16°C | 20°C |
| October | 12°C | 16°C | 19°C |
| November | 10°C | 13°C | 18°C |
| December | 10°C | 12°C | 16°C |
* Click on a month to view detailed water temperature data.
Fremont: Weather Forecast
June 13
June 14
June 15
June 16
Location, Beaches & Local Information
Swimming Conditions
Swimming and beach-style recreation around Fremont reflect those temperature and access patterns. Traditional sandy ocean beaches are not found in the city; instead people swim or paddle in managed freshwater areas, municipal pools and select regional park sites where conditions and signage permit contact recreation, and experienced open-water swimmers take to the bay with wetsuits because temperatures remain brisk even in summer. Safety considerations are important: tidal currents, sudden cold, limited lifeguard coverage, and periodic water-quality advisories mean checking local rules and recent testing before entering any water. For a beach-like holiday, visitors often combine local lakeside recreation with trips to nearby ocean beaches across the bay where facilities and bathing conditions differ.