Alto, California Weather
Alto, California — live current conditions, hourly and 7-day forecasts, NWS alerts, radar and satellite imagery, tide predictions, marine conditions and a solunar fishing forecast for Alto, Marin County.
Tides, marine forecast and fishing conditions near Alto. Tide source:
Full aviation weather for Alto is published on the Oakland San Francisco Bay Airport (KOAK) page, 34 km away. It carries the current METAR decoded into plain language — surface wind, visibility, cloud layers and ceiling, temperature and dewpoint, and altimeter setting — alongside the raw observation as transmitted. 6 airfields within reach of Alto have their own pages, listed below.
The Terminal Aerodrome Forecast (TAF) is shown across its full validity period, with each change group broken out so you can see when conditions are expected to shift. Flight category is derived automatically — VFR, MVFR, IFR or LIFR — from reported ceiling and visibility, with runway details and field elevation alongside. Observations update roughly hourly and forecasts several times a day.
Other airports near Alto: San Francisco International Airport (KSFO) 34 km · Buchanan Field (KCCR) 42 km · Half Moon Bay Airport (KHAF) 44 km · Hayward Executive Airport (KHWD) 45 km · San Carlos Airport (KSQL) 50 km
Conditions reported at KOAK describe the airfield itself. Weather 34 km away can differ, particularly in terrain or near the coast. For conditions at Alto specifically, see the current conditions and forecast above.
About Alto, California
Alto unfolds into a landscape of rolling hills, their slopes painted in muted greens and ochres, a testament to the dry California summers and the vibrant life that returns with the coastal fog. It lies 4.8 miles south of San Rafael, CA (from San Rafael, CA: bearing 176°T), and is situated 9.9 miles west-south-west of Richmond. The air here carries a crisp, salty tang, a constant reminder of the proximity to the Pacific, even when the ocean itself is out of sight. Oak trees, gnarled and ancient, dot the hillsides, their branches reaching out like weathered arms, while chaparral, a dense, fragrant scrub, clings to the steeper inclines. Sunlight, when it breaks through the coastal haze, casts long, dramatic shadows, transforming the familiar terrain into something ethereal, a place where the earth feels both solid and alive. This is a place where a quiet resilience is woven into its character, a spirit shaped by its proximity to the sea and its history as a gateway to further exploration. The land around Alto has long supported a modest agricultural presence, its fertile pockets yielding to vineyards and orchards that speak of generations of cultivation. The rhythm of life in Alto is one of unhurried purpose, a blend of the natural world's slow unfolding and the steady hum of a community that values its connection to the land and to each other. The sense of history is not loud or ostentatious, but present in the weathered fences, the enduring trees, and the very contour of the hills, a subtle echo of lives lived and work done.
Live animated radar for Alto and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
| Location | Alto, Marin County, California |
| Coordinates | 37.90437°N, 122.525531°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 94941 |
| Area Code | 510 |
| Page generated | September 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Alto, California Weather Page
This page provides live weather conditions and forecasts for Alto, California, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, precipitation radar and NOAA GOES-16 satellite imagery. Aviation weather — live METAR observations and TAF forecasts — is published separately on the pages for the nearest reporting airports, linked from the aviation section above. Additional sections may include tide predictions, wave height, wave direction and sea-surface temperature, a barometric pressure trend, and a solunar-based fishing forecast with a fishing-conditions rating for coastal localities, and soil temperature, crop weather and live USGS river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for Alto includes coordinates 37.904370°N, 122.525531°W, situated in Marin County. ZIP code 94941. Telephone area code: 510. Timezone: Pacific Time (America/Los_Angeles).
Weather data is sourced from the NOAA National Weather Service (NWS) and the open-source Open-Meteo API. River and stream data is sourced from the USGS National Water Information System. Tide predictions are sourced from NOAA CO-OPS; marine and solunar data are modeled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-East and is public domain.
