San Gregorio — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for San Gregorio (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 San Gregorio help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in San Gregorio in the Pacific Ocean today is 12°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.
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 San Gregorio today is lower than both a week ago and a month ago. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in San Gregorio will be 12.7°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 1 | 13.5°C | 12.8°C | |
| JUN 2 | 13.5°C | 13.0°C | |
| JUN 3 | 13.6°C | 13.0°C | |
| JUN 4 | 14.0°C | 12.8°C | |
| JUN 5 | 14.1°C | 13.0°C | |
| JUN 6 | 14.3°C | 12.8°C | |
| JUN 7 | 13.7°C | 12.5°C | |
| JUN 8 | 13.3°C | 13.0°C | |
| JUN 9 | 12.3°C | 13.0°C | 12.3°C |
| JUN 10 | 12.3°C | 12.4°C | |
| JUN 11 | 12.8°C | 12.4°C | |
| JUN 12 | 12.5°C | 12.5°C | |
| JUN 13 | 12.8°C | 12.5°C | |
| JUN 14 | 13.3°C | 12.6°C | |
| JUN 15 | 13.3°C | 12.7°C | |
| JUN 16 | 13.3°C | 12.7°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
San Gregorio, on the northern California coast in San Mateo County, offers a rugged Pacific shoreline with wide sandy stretches and dramatic bluff-backed scenery. The ocean here is typically cool year-round; seasonal surface temperatures generally fall in the range of about 10–12°C in winter (December–February), rise modestly to roughly 11–13°C in spring (March–May), warm to approximately 13–17°C in summer (June–August), and cool again to near 12–15°C in autumn (September–November). Local variations occur with upwelling, fog, and offshore currents, so on any given day the water may feel several degrees cooler than air temperatures. These temperatures reflect the broader cold-water character of the central California coast and help shape marine life and coastal conditions at San Gregorio.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 9°C | 12°C | 14°C |
| February | 10°C | 12°C | 15°C |
| March | 10°C | 12°C | 15°C |
| April | 10°C | 13°C | 16°C |
| May | 10°C | 13°C | 16°C |
| June | 9°C | 13°C | 16°C |
| July | 11°C | 14°C | 16°C |
| August | 12°C | 15°C | 18°C |
| September | 13°C | 15°C | 18°C |
| October | 12°C | 15°C | 17°C |
| November | 10°C | 13°C | 17°C |
| December | 10°C | 12°C | 15°C |
* Click on a month to view detailed water temperature data.
San Gregorio: Weather Forecast
June 11
June 12
June 13
Location, Beaches & Local Information
Nearby Beaches & Facilities
San Gregorio State Beach
San Gregorio Private Beach
Pomponio State Beach
Tunitas Creek Beach
Pescadero State Beach - North Beach
Martins Beach
Pescadero State Beach - South Beach
Pescadero Point Beach
Pescadero Beach
Swimming Conditions
Swimming at San Gregorio is possible but not comparable to warmer beach destinations; the cool water and frequently strong surf and rip currents make extended open-ocean swimming uncomfortable and potentially hazardous without proper preparation. Visitors seeking water activities often opt for brief dips, wetsuit-clad swims, or surfing and bodyboarding, as the beach can produce surfable waves. For a beach holiday, the site is well suited to walks, picnics, tidepooling near rocky areas, and watching coastal wildlife, while cautious visitors with experience in cold-water conditions can enjoy short swims. Paying attention to local advisories, tide and current reports, and choosing appropriate gear such as full wetsuits will improve safety and comfort for those entering San Gregorio’s chilly Pacific waters.