Small Island



Area of dry or relatively dry land surrounded by water or low wetland.
land Icon Land
Map Marker

GPS Coordinates

Latitude, Longitude:
38.5796288°, -122.2371978°
Elevation Icon


443 ft. (135 m.)

Topographic Map

US Topo Map

The USGS (U.S. Geological Survey) publishes a set of the most commonly used topographic maps of the U.S. called US Topo that are separated into rectangular quadrants that are printed at 22.75"x29" or larger. Small Island is covered by the Lake Berryessa, CA US Topo Map quadrant

Free US Topo Map PDF Order Waterproof Printed Topo Map
Water Icon Water
Land Icon Land
Man-made Icon Man-made

Nearby Islands

Big Island 0.8 mi
Goat Island 1.7 mi
Schoolhouse Island 3.1 mi
Indian Island 3.7 mi

Nearby Cities

Nearby Points of Interest

Smittle Creek Picnic Area Man-made 0.5 mi
Berryessa Marina Man-made 0.6 mi
Lake Berryessa Water 0.8 mi
Smittle Creek Water 0.9 mi
Lake Berryessa Recreation Area Man-made 1.1 mi

Historical Weather

Below are weather averages from 1971 to 2000 according to data gathered from the nearest official weather station. The nearest weather station for both precipitation and temperature measurements is MARKLEY C which is approximately 8 miles away and has an elevation of 480 feet (37 feet higher than Small Island). Because the nearest station and this geographic feature may have differences in elevation and topography, the historic weather at the two separate locations may be different as well.

Average Daily Temperatures by Month (°F)

Average Monthly Precipitation (in inches)

Month Precip AVG High Temp AVG Low Temp
January 5.85" 54.8° 35.9°
February 5.83" 59.6° 38.2°
March 4.68" 63.8° 40.5°
April 1.42" 70.1° 43.0°
May .78" 78.2° 48.2°
June .13" 86.4° 53.6°
July .03" 92.8° 57.1°
August .07" 92.1° 56.5°
September .34" 87.5° 54.1°
October 1.34" 77.8° 48.4°
November 3.22" 63.4° 41.1°
December 4.25" 55.7° 36.0°

Summer High Temps

This location's average summer high temps are higher than 85% of other locations on record.

Winter Low Temps

This location's average winter low temps are higher than 88% of other locations on record.

Precipitation Levels

This location's average precipitation levels are lower than 64% of other locations on record.