Loading page content…
Loading page content…
Loading lake conditions…
In California, Lake San Antonio is a reservoir used for time on and around the water. Its recorded surface area is approximately 5,720 acres. Other waters in the region include Lake Nacimiento. The page brings together an hourly and 7-day forecast, wind and gust outlook, and activity scores for boating, paddling, and swimming. Check the hourly forecast and activity outlook below before heading out to Lake San Antonio.
Updated
No active alerts for this lake as of the last check (Oct 9, 9:14 AM PDT). Alerts are re-checked automatically; see the official source for updates.
Overall Excellent (91/100) across 4 activities. Best right now: Boating (99/100).
How the score is calculated →Best excellent fishing window, averaging 94/100 across these hours. Wind 7 mph from the southwest. Dusk hours (18:00 local). Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 61° | 67° | 72° | 76° | 79° | 81° | 82° | 80° | 79° | 75° | 70° | 66° | 63° | 61° | 60° | 58° | 58° | 56° | 56° | 54° | 53° | 52° | 51° | 52° |
| Wind (kts) | 2 | 2 | 3 | 4 | 6 | 7 | 8 | 8 | 7 | 5 | 4 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 |
| Direction | SE | SE | S | S | S | SW | SW | SW | SW | SW | W | SW | SW | S | S | SE | E | NE | E | E | S | S | S | W |
| Gusts (kts) | 4 | 6 | 7 | 10 | 13 | 16 | 17 | 17 | 16 | 12 | 9 | 6 | 5 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 6 |
| Precip % | 0% | 1% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 1% | 4% | 0% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Fri, 9 AM PDT | 61°F | 2 mph ESE (113°) | 5 mph | 0% | 19% | Sunny |
| Fri, 10 AM PDT | 67°F | 2 mph SE (135°) | 7 mph | 1% | 1% | Sunny |
| Fri, 11 AM PDT | 72°F | 3 mph S (180°) | 8 mph | 0% | 1% | Sunny |
| Fri, 12 PM PDT | 76°F | 5 mph S (180°) | 12 mph | 0% | 1% | Sunny |
| Fri, 1 PM PDT | 79°F | 7 mph S (180°) | 15 mph | 0% | 0% | Sunny |
| Fri, 2 PM PDT | 81°F | 8 mph SSW (203°) | 18 mph | 0% | 2% | Sunny |
| Fri, 3 PM PDT | 82°F | 9 mph SSW (203°) | 20 mph | 0% | 2% | Sunny |
| Fri, 4 PM PDT | 80°F | 9 mph SSW (203°) | 20 mph | 0% | 0% | Sunny |
| Fri, 5 PM PDT | 79°F | 8 mph SW (225°) | 18 mph | 0% | 0% | Sunny |
| Fri, 6 PM PDT | 75°F | 6 mph SW (225°) | 14 mph | 0% | 0% | Clear |
| Fri, 7 PM PDT | 70°F | 5 mph WSW (248°) | 10 mph | 0% | 2% | Clear |
| Fri, 8 PM PDT | 66°F | 3 mph SW (225°) | 7 mph | 0% | 7% | Mostly Clear |
| Fri, 9 PM PDT | 63°F | 2 mph SSW (203°) | 6 mph | 0% | 7% | Mostly Clear |
| Fri, 10 PM PDT | 61°F | 2 mph SSE (158°) | 6 mph | 0% | 14% | Mostly Clear |
| Fri, 11 PM PDT | 60°F | 2 mph S (180°) | 6 mph | 0% | 19% | Mostly Clear |
| Sat, 12 AM PDT | 58°F | 2 mph SE (135°) | 5 mph | 0% | 23% | Mostly Clear |
| Sat, 1 AM PDT | 58°F | 2 mph E (90°) | 5 mph | 0% | 17% | Mostly Clear |
| Sat, 2 AM PDT | 56°F | 2 mph NE (45°) | 4 mph | 0% | 29% | Partly Cloudy |
| Sat, 3 AM PDT | 56°F | 1 mph E (90°) | 4 mph | 0% | 37% | Partly Cloudy |
| Sat, 4 AM PDT | 54°F | 1 mph E (90°) | 4 mph | 0% | 45% | Patchy Fog |
| Sat, 5 AM PDT | 53°F | 2 mph S (180°) | 4 mph | 0% | 79% | Patchy Fog |
| Sat, 6 AM PDT | 52°F | 2 mph S (180°) | 4 mph | 1% | 79% | Patchy Fog |
| Sat, 7 AM PDT | 51°F | 2 mph S (180°) | 4 mph | 4% | 79% | Patchy Fog |
| Sat, 8 AM PDT | 52°F | 2 mph W (270°) | 7 mph | 0% | 60% | Patchy Fog |
| Sat, 9 AM PDT | 54°F | 2 mph W (270°) | 7 mph | 0% | 60% | Patchy Fog |
Official National Weather Service hourly forecast. Showing 10 of 25 hours. Wind arrows point the way the wind is blowing; the compass point and degrees show where it comes from.
| Period | Today October 9, 2026 | Tonight October 9, 2026 | Saturday October 10, 2026 | Saturday Night October 10, 2026 | Sunday October 11, 2026 | Sunday Night October 11, 2026 | Columbus Day October 12, 2026 | Monday Night October 12, 2026 | Tuesday October 13, 2026 | Tuesday Night October 13, 2026 | Wednesday October 14, 2026 | Wednesday Night October 14, 2026 | Thursday October 15, 2026 | Thursday Night October 15, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 84° | 50° | 74° | 45° | 67° | 42° | 64° | 41° | 72° | 44° | 76° | 48° | 83° | 51° |
| Wind | SSE 2 to 9 mph | SSE 1 to 6 mph | SW 2 to 8 mph | WNW 2 to 7 mph | WNW 2 to 14 mph | SSW 3 to 14 mph | S 3 to 9 mph | WNW 1 to 7 mph | NNW 1 to 7 mph | NW 1 to 7 mph | N 1 to 5 mph | NNW 0 to 5 mph | N 0 to 3 mph | N 2 mph |
| Gusts | 20 mph | 14 mph | 18 mph | 18 mph | 25 mph | 25 mph | 21 mph | 17 mph | 17 mph | 17 mph | 15 mph | 15 mph | 12 mph | 12 mph |
| Precip % | 1% | 0% | 4% | 0% | 2% | 55% | 55% | 16% | 2% | 0% | 0% | 0% | 0% | 0% |
| Forecast |
Excellent for fishing (92/100), from 5 available inputs. Supporting this: Wind 2 mph from the east-southeast. Morning hours (09:00 local). 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 boating (99/100), from 4 available inputs. Supporting this: Wind 2 mph from the east-southeast. Gusts to 5 mph. 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.
Fair for sailing (71/100), from 4 available inputs. Supporting this: Gusts are within 3 mph of sustained wind, so the breeze is steady. No active official alerts for this lake. Working against it: Wind 2 mph is light; expect limited sailing. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Excellent for kayaking (98/100), from 5 available inputs. Supporting this: Wind 2 mph from the east-southeast. Gusts to 5 mph. Confidence is high (90%).
Water temperature is not available from a verified source for this lake. No swimming score is shown without it.
Loading interactive map…
Individual boat ramp GPS coordinates are maintained under the jurisdiction of CA Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
Nestled in CA, Lake San Antonio delivers expansive open water and sheltered shoreline pockets ideal for varied outdoor pursuits. From high-speed watersports to relaxed drift fishing, the lake accommodates diverse visitor preferences. Always check current weather advisories and water temperatures before heading out.
Valid freshwater sport fishing license issued by California Department of Fish and Wildlife (CDFW) is required for anglers age 16+. Digital license on mobile is accepted.
Mandatory Clean, Drain & Dry inspection. Out-of-area craft require on-site Aquatic Invasive Species (AIS Quagga/Zebra) inspection or decontamination before launch. USCG life jackets required for all.
Public shoreline and boating access managed by State & Local Authorities. Verify seasonal gate hours, launch fees, and parking rules before travel.
High-speed motorboating, pontoon cruising, wakeboarding, and water skiing across main channels. Target gamefish include Common Carp, Channel Catfish, Black Crappie, Rainbow Trout. Morning hours typically provide optimal glassy conditions for kayak and stand-up paddleboard (SUP) touring.
Warm water temperatures, peak swimming, active watersports, and open full-service campgrounds. Highest weekly attendance; plan early arrivals on summer weekends.
Spring pre-spawn and fall feeding transitions create prime trophy angling conditions. Cooler air, lower boat traffic, and vibrant seasonal shoreline foliage.
Mild year-round outdoor climate. Uncrowded waters, active winter bass and crappie fishing, and open year-round boat launch access.
No external source rows are cited by the data currently shown on this page.
Updated
Scores are heuristics, not safety guarantees. LakeRadar scores summarize available conditions and are not a substitute for official warnings, local rules, or on-water judgment.
All telemetry for Lake San Antonio is synchronized directly from authorized federal and state monitoring networks (USGS, NWS, NOAA, and state environmental authorities). Observations are strictly instrumented readings — unmonitored sensors are transparently disclosed rather than synthetic estimates.
Last source audit: Oct 9, 9:13 AM PDT