The best times to visit St Simons Island for ideal weather are
March 5th to May 20th
October 1st to December 30th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
St Simons Island Travel Guide
Other St Simons Island Travel Info
Weather in St Simons Island
Average temperatures in St Simons Island vary greatly. Considering humidity, temperatures feel nice most of the year, excluding some hot weeks in the summer, with a fair chance of precipitation about half of the year. The area is somewhat temperate — in the 41st percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit St Simons Island, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 91.4°F (33°C) with temperatures rarely dropping below 76.5°F (24.7°C) at night.
St Simons Island Temperatures (Fahrenheit)
St Simons Island Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
St Simons Island Perceived Temperature (F)
St Simons Island Perceived Temperature (C)
Average St Simons Island Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in St Simons Island are November, December, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid November. For example, on the week of November 12th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid to late August with an average of 3 days of significant precipitation the week of August 20th.
When can you find snow in St Simons Island? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in St Simons Island.
Snow on the Ground
The graph below shows the average snow on the ground in St Simons Island (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
St Simons Island has some very humid months, and above average humidity throughout the year. The least humid month is February (61.7% relative humidity), and the most humid month is August (72.7%).
Wind in St Simons Island is usually calm. The windiest month is May, followed by April and March. May’s average wind speed of around 7.6 knots (8.7 MPH or 14.1 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early July where average top sustained speeds reach 13.5 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in St Simons Island.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||6.2||Light breeze||11.5||Significant breeze|
|Feb||6.3||Light breeze||11.8||Significant breeze|
|Mar||6.9||Light breeze||12.7||Significant breeze|
|Apr||7.1||Gentle breeze||12.7||Significant breeze|
|May||7.6||Gentle breeze||13.1||Significant breeze|
|Jun||6.8||Light breeze||12.9||Significant breeze|
|Jul||6.7||Light breeze||12.8||Significant breeze|
|Aug||6.3||Light breeze||12.3||Significant breeze|
|Sep||6.6||Light breeze||12.3||Significant breeze|
|Oct||6.1||Light breeze||11.5||Significant breeze|
|Nov||6.3||Light breeze||11.6||Significant breeze|
|Dec||5.8||Light breeze||10.8||Gentle breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to St Simons Island?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in St Simons Island, GA, US is July, followed by March and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit St Simons Island in November. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall St Simons Island Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 84.8°F (29.3°C) and 65.6°F (18.7°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 5 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 6 to 10 days of precipitation per month. June – August is the busiest season for tourism in St Simons Island, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 87°F (30.6°C) and 67.6°F (19.8°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 2 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is too cold this time of year in St Simons Island to be enjoyable for warm weather travelers. The average high during this season is between 68°F (20°C) and 61.4°F (16.3°C). On average, it rains or snows a fair amount: 4 to 6 times per month. These times of year are fairly slow with tourists.