The best times to visit Merritt Island for ideal weather are

November 5th to May 6th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Merritt Island Travel Info

Weather in Merritt Island


Average temperatures in Merritt Island vary somewhat. Considering humidity, temperatures feel hot for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is somewhat temperate — in the 46th 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 Merritt Island, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 90.7°F (32.6°C) with temperatures rarely dropping below 74.5°F (23.6°C) at night.

Merritt Island Temperatures (Fahrenheit)


Merritt Island Temperatures (Celsius)


“Feels-Like” Temperatures

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.

Merritt Island Perceived Temperature (F)


Merritt Island Perceived Temperature (C)



Average Merritt 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.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 71.8 61.2 52.5
Feb 73.2 62.4 53.6
Mar 76.2 66.3 57.4
Apr 80.9 71.9 63.6
May 84.5 76.1 67.9
Jun 88.4 79.6 71.9
Jul 89.3 80.6 73.6
Aug 90.2 81.6 74.5
Sep 88.3 80.1 73.4
Oct 84.2 75.6 68.2
Nov 78 68.9 61.3
Dec 75.4 65.3 57.2

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 22.1 16.2 11.4
Feb 22.9 16.9 12
Mar 24.6 19.1 14.1
Apr 27.2 22.2 17.6
May 29.2 24.5 19.9
Jun 31.3 26.4 22.2
Jul 31.8 27 23.1
Aug 32.3 27.6 23.6
Sep 31.3 26.7 23
Oct 29 24.2 20.1
Nov 25.6 20.5 16.3
Dec 24.1 18.5 14



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Merritt Island are March, November, and then May. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late April. For example, on the week of April 23rd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late September with an average of 3 days of significant precipitation the week of September 24th.

When can you find snow in Merritt 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 Merritt Island.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Merritt Island (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 18% 0 3
Feb 16% 0 2.2
Mar 11% 0 1.9
Apr 14% 0 2.9
May 14% 0 3.4
Jun 23% 0 4.8
Jul 29% 0 4.8
Aug 28% 0 7.6
Sep 34% 0 16.6
Oct 20% 0 13
Nov 14% 0 3.3
Dec 16% 0 1.9

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 18 0 7.6
Feb 16 0 5.6
Mar 11 0 4.8
Apr 14 0 7.4
May 14 0 8.6
Jun 23 0 12.2
Jul 29 0 12.2
Aug 28 0 19.3
Sep 34 0 42.2
Oct 20 0 33
Nov 14 0 8.4
Dec 16 0 4.8


Humidity and Wind

Merritt Island has some very humid months, and above average humidity throughout the year. The least humid month is March (66% relative humidity), and the most humid month is July (78.6%).

Wind in Merritt Island is usually calm. The windiest month is March, followed by April and May. March’s average wind speed of around 7.3 knots (8.4 MPH or 13.6 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 late February and early March where average top sustained speeds reach 14 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Merritt Island.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

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 6.7 Light breeze 12.3 Significant breeze
Feb 6.8 Light breeze 12.8 Significant breeze
Mar 7.3 Gentle breeze 13.2 Significant breeze
Apr 7.3 Gentle breeze 13.2 Significant breeze
May 6.9 Light breeze 12.6 Significant breeze
Jun 6 Light breeze 13 Significant breeze
Jul 5.6 Light breeze 12.9 Significant breeze
Aug 5.5 Light breeze 12.5 Significant breeze
Sep 5.1 Light breeze 11.4 Significant breeze
Oct 6.2 Light breeze 11.3 Significant breeze
Nov 6.7 Light breeze 12 Significant breeze
Dec 6.3 Light breeze 11.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 69.8%
Feb 68%
Mar 66%
Apr 67.9%
May 69.7%
Jun 75.1%
Jul 78.6%
Aug 77.8%
Sep 76.5%
Oct 69.7%
Nov 69.7%
Dec 73.9%


Is it Safe to Travel to Merritt 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 Merritt Island, FL, US is March, followed by July and February. 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 Merritt Island in October. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 51.9 in October means 51.9% of the tourists vs. March.



Overall Merritt Island Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 86°F (30°C) and 73.9°F (23.3°C) with warmer temperatures in the later months. Rain is somewhat common with roughly 4 days of significant precipitation per month. Spring is the 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 7 to 9 days of precipitation per month. June – August is the second busiest season for tourism in Merritt Island, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 89.1°F (31.7°C) and 75.9°F (24.4°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 4 to 10 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 somewhat cool this time of year in Merritt Island to be enjoyable for warm weather travelers. The average high during this season is between 76.2°F (24.6°C) and 71.3°F (21.8°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.


Best Times to Travelthe United States › Merritt Island, FL, US