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Official National Weather Service (NWS) point forecast and real-time wind conditions for Lake San Antonio (California). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 82°F · Low 52°F
Peak gusts: 3 mph · Lake surface chop expected
Humidity: 25% · Barometer: 29.83 inHg
USGS water monitoring available for Lake San Antonio.
Excellent for boating (90/100), from 4 available inputs. Supporting this: Wind 7 mph from the south. No active official alerts for this lake. Not available from a verified source for this lake: visibility and conditions, verified water access. Confidence is moderate (84%) because some inputs are unavailable or older than ideal.
Good for fishing (83/100), from 5 available inputs. Supporting this: Wind 7 mph from the south. 0% chance of precipitation. Not available from a verified source for this lake: pressure trend, water temperature. Confidence is moderate (74%) because some inputs are unavailable or older than ideal.
Excellent for kayaking (90/100), from 5 available inputs. Supporting this: Wind 7 mph from the south. No active official alerts for this lake. Confidence is high (90%).
Water temperature is not available from a verified source for this lake. No swimming score is shown without it. Supporting this: No active official alerts for this lake. Air temperature 79°F. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 1 PM | 79°F | 7 mph | S | ⚡ 15 mph | 0% | Sunny |
| 2 PM | 81°F | 8 mph | SW | ⚡ 18 mph | 0% | Sunny |
| 3 PM | 82°F | 9 mph | SW | ⚡ 20 mph | 0% | Sunny |
| 4 PM | 80°F | 9 mph | SW | ⚡ 20 mph | 0% | Sunny |
| 5 PM | 79°F | 8 mph | SW | ⚡ 18 mph | 0% | Sunny |
| 6 PM | 75°F | 6 mph | SW | ⚡ 14 mph | 0% | Clear |
| 7 PM | 70°F | 5 mph | W | ⚡ 10 mph | 0% | Clear |
| 8 PM | 66°F | 3 mph | SW | ⚡ 7 mph | 0% | Mostly Clear |
| 9 PM | 63°F | 2 mph | SW | ⚡ 6 mph | 0% | Mostly Clear |
| 10 PM | 61°F | 2 mph | S | ⚡ 6 mph | 0% | Mostly Clear |
| 11 PM | 60°F | 2 mph | S | ⚡ 6 mph | 0% | Mostly Clear |
| 12 AM | 58°F | 2 mph | SE | ⚡ 5 mph | 0% | Mostly Clear |
| 1 AM | 58°F | 2 mph | E | ⚡ 5 mph | 0% | Mostly Clear |
| 2 AM | 56°F | 2 mph | NE | ⚡ 4 mph | 0% | Partly Cloudy |
| 3 AM | 56°F | 1 mph | E | ⚡ 4 mph | 0% | Partly Cloudy |
| 4 AM | 54°F | 1 mph | E | ⚡ 4 mph | 0% | Patchy Fog |
| 5 AM | 53°F | 2 mph | S | ⚡ 4 mph | 0% | Patchy Fog |
| 6 AM | 52°F | 2 mph | S | ⚡ 4 mph | 1% | Patchy Fog |
| 7 AM | 51°F | 2 mph | S | ⚡ 4 mph | 4% | Patchy Fog |
| 8 AM | 52°F | 2 mph | W | ⚡ 7 mph | 0% | Patchy Fog |
| 9 AM | 54°F | 2 mph | W | ⚡ 7 mph | 0% | Patchy Fog |
| 10 AM | 58°F | 2 mph | W | ⚡ 7 mph | 0% | Partly Sunny |
| 11 AM | 62°F | 5 mph | W | ⚡ 15 mph | 0% | Sunny |
| 12 PM | 64°F | 5 mph | W | ⚡ 15 mph | 0% | Sunny |
Mirror-like to gentle rippled water. Optimal conditions for paddleboarding, kayaking, swimming, and beginner water skiing or wakeboarding.
Pleasant breeze with small wavelets. Great for sailing, pleasure cruising, pontoon boats, and trolling for trout and bass.
Moderate waves with whitecaps likely. Requires skilled boat handling; kayaks, canoes, and stand-up paddleboards should stay close to sheltered bays.
Steep waves, cold spray, and hazardous open water. Avoid small craft voyages. Always check official National Weather Service lake wind advisories.
Sunny. High near 84, with temperatures falling to around 79 in the afternoon. South southeast wind 2 to 9 mph, with gusts as high as 20 mph.
Patchy fog after 4am. Mostly clear. Low around 50, with temperatures rising to around 53 overnight. South southeast wind 1 to 6 mph.
Patchy fog before 10am. Mostly sunny. High near 74, with temperatures falling to around 71 in the afternoon. Southwest wind 2 to 8 mph, with gusts as high as 18 mph.
Partly cloudy, with a low around 45. West northwest wind 2 to 7 mph, with gusts as high as 18 mph.
Sunny, with a high near 67. West northwest wind 2 to 14 mph, with gusts as high as 25 mph.
Rain likely after 11pm. Partly cloudy, with a low around 42. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Rain likely. Partly sunny, with a high near 64.
A slight chance of rain before 11pm, then patchy fog. Partly cloudy, with a low around 41.
Patchy fog before 9am. Sunny, with a high near 72.
Patchy fog after 4am. Mostly clear, with a low around 44.
Patchy fog before 9am. Sunny, with a high near 76.
Clear, with a low around 48.
Sunny, with a high near 83.
Clear, with a low around 51.
Lake San Antonio currently reports 81°F with wind velocity near 3 mph from the S. Atmospheric forecasts and 24-hour hour-by-hour wind timelines are updated hourly from the National Weather Service gridpoint matching the lake's coordinates.
At Lake San Antonio and surrounding mountain valleys, diurnal heating of the surrounding terrain causes strong thermal pressure differentials known locally as afternoon breezes (such as the Washoe Zephyr at Lake Tahoe). Wind speeds typically peak between 1:00 PM and 5:00 PM before calming near sunset.
For stand-up paddleboarding (SUP), canoeing, and light kayaks, winds under 7 mph (light breeze) offer the safest, glassiest surface conditions. Between 8–14 mph, small wavelets develop, suitable for sailboats and powerboats. Winds exceeding 15 mph create steep whitecaps and rapid drift; winds over 21 mph warrant small craft warnings.
All weather and wind telemetry is fetched directly from the National Weather Service (NOAA - WFO MTR) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Lake San Antonio without artificial smoothing or third-party estimates.
Yes. Live hydrological sensor readings, 30-day elevation histories, full-pool benchmarks, and USGS station provenance are available on our dedicated Lake San Antonio Water Level & Temperature page.
View Lake San Antonio Water Level & Temperature →