Local weather forecast

Weather in San Mateo, FL

Updated 2026-09-26 12:00 local time · ZIP codes 32187

Sunny
Now80°F

Sunny

High / Low85° / 62°
Rain chance3%
Wind5 mph
Weather alerts

Active alerts

2
Coastal Flood Advisory issued September 26 at 12:14AM EDT until September 27 at 5:00AM EDT by NWS Jacksonville FL

* WHAT...Minor coastal flooding. * WHERE...St Johns River Basin. * WHEN...Until 5 AM EDT Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected.

Safety instructions

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Flood Warning issued September 25 at 9:19PM EDT by NWS Melbourne FL

...The Flood Warning continues for the following rivers in Florida... St Johns River Near Astor affecting Volusia and Lake Counties. .The St Johns River at Astor remains within Minor Flood Stage and is forecast to continue to rise, cresting on Sunday due to an ongoing period of northerly winds and tidal effects. River levels are forecast to then subside slightly before remaining steady through the middle of next week. For the St. Johns River...including Cocoa 9w, Above Lake Harney, Sanford, Deland, Astor...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...St Johns River near Astor. * WHEN...Until further notice. * IMPACTS...At 2.8 feet, Docks and boat ramps covered at South Moon Fish Camp and approaching sea wall at Blair's Jungle Den. Water approaching sites closest to the river at Fish Tales RV Resort and Astor Landing Campground. Portion of Clair Street covered by river water south of the Butler Boat Ramp. Docks underwater at the Astor Bridge Marina and along Riveredge Drive. Portions of Fox Road are covered with water nearest to the river. Acorn, Hazelnut and Redbud roads are underwater with yards inundated. * ADDITIONAL DETAILS... - At 8:30 PM EDT Friday the stage was 2.7 feet. - Bankfull stage is 2.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM EDT Friday was 2.7 feet. - Forecast...The river is expected to rise to a crest of 2.8 feet early Sunday morning. - Flood stage is 2.3 feet. - Flood History...This crest compares to a previous crest of 2.9 feet on 10/17/1999. - http://www.weather.gov/safety/flood

Safety instructions

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely. Additional information is available at www.weather.gov. The next statement will be issued Saturday morning at 1100 AM EDT.

Hourly

Next hours

NowSunny80°1% rain
1 PMSunny83°0% rain
2 PMSunny84°0% rain
3 PMSunny85°0% rain
4 PMSunny85°0% rain
5 PMSunny84°0% rain
6 PMSunny81°0% rain
7 PMSunny74°2% rain
8 PMClear69°4% rain
9 PMClear68°5% rain
10 PMClear67°6% rain
11 PMClear67°7% rain
Forecast

3-day weather forecast

Today2026-09-26
Sunny
85° 62°Sunny
Rain 3%Gust 6 mph
Tomorrow2026-09-27
Partly Cloudy
87° 63°Partly Cloudy
Rain 6%Gust 4 mph
Monday2026-09-28
Sunny
90° 67°Sunny
Rain 57%Gust 6 mph
Conditions

Weather details

Feels like76°F
Humidity27%
Pressure30.00 inHg
Visibility6 mi
Wind5 mph N
Wind gusts6 mph
Precipitation0.00 in
UV index7
Daylight

Sunrise, sunset and moon

Sunrise07:16 AM
Sunset07:18 PM
Moonrise07:13 PM
Moon phaseFull Moon
Next 24 hours

Key weather changes ahead

Warmest hour3 PM · 85°F
Coolest hour7 AM · 63°F
Highest rain chance8 AM · 24%
Strongest gusts8 PM · 13 mph
Practical guide

Weather insights for today

Umbrella not essential

Rain chance stays relatively low over the next 12 hours (up to 7%).

Light layers should work

It feels like 76°F with winds near 5 mph.

Best window: 8 PM

69°F, 4% rain chance and 4 mph wind.

Driving conditions look generally normal

Visibility is around 6 mi; gusts may reach 13 mph.

Run with a few weather adjustments

Current temperature is 80°F, wind 5 mph, rain chance up to 7%.

High UV protection needed

UV index is 7. Sunscreen, shade and protective clothing are recommended.

Local weather characteristics in San Mateo

Florida is warm and humid for much of the year. Sea breezes drive frequent summer thunderstorms, while tropical systems and hurricanes are an important warm-season risk.

San Mateo is part of the South weather region. The forecast point is near 29.61°N latitude and 81.58°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.

San Mateo weather today

Sunny and 80°F in San Mateo, FL. Today's high is 85°F with a 3% rain chance. Winds are around 5 mph with gusts near 6 mph. Relative humidity is 27%, pressure is 30.00 inHg, and visibility is about 6 miles.

Tonight and tomorrow in San Mateo

Sunrise is at 07:16 AM and sunset is at 07:18 PM. Tomorrow's forecast calls for Partly Cloudy with a high near 87°F and a low near 63°F. The maximum rain chance is 6%.

Nearby

Weather near San Mateo

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