The best times to visit Grotto Bay for ideal weather are

November 19th to April 15th

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



Other Grotto Bay Travel Info

Weather in Grotto Bay


Average temperatures in Grotto Bay vary very little. Considering humidity, temperatures feel very enjoyable all year with a low chance of precipitation most of the year. The area is more temperate than most — in the 89th 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 Grotto Bay, the hottest months are February, January, and then December. See average monthly temperatures below. The warmest time of year is generally early February where highs are regularly around 75.7°F (24.3°C) with temperatures rarely dropping below 60.2°F (15.7°C) at night.

Grotto Bay Temperatures (Fahrenheit)


Grotto Bay 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.

Grotto Bay Perceived Temperature (F)


Grotto Bay Perceived Temperature (C)



Average Grotto Bay 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 73 64.6 59.2
Feb 73.1 64.7 59.3
Mar 71.9 63.3 58.3
Apr 70.4 61.4 56.6
May 66.9 58.4 54.4
Jun 63.5 57.1 53.3
Jul 67.3 57.3 53.2
Aug 65 56.4 52.1
Sep 65 58.2 54.1
Oct 67 59.8 54.7
Nov 69.4 61.9 56.8
Dec 71.6 63.5 57.9

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 22.8 18.1 15.1
Feb 22.8 18.2 15.2
Mar 22.2 17.4 14.6
Apr 21.3 16.3 13.7
May 19.4 14.7 12.4
Jun 17.5 13.9 11.8
Jul 19.6 14.1 11.8
Aug 18.3 13.6 11.2
Sep 18.3 14.6 12.3
Oct 19.4 15.4 12.6
Nov 20.8 16.6 13.8
Dec 22 17.5 14.4



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Grotto Bay are February, December, and then January. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid January. For example, on the week of January 8th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late April with an average of 2 days of significant precipitation the week of April 23rd.

When can you find snow in Grotto Bay? 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 Grotto Bay.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Grotto Bay (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 2% 0 0.1
Feb 0% 0 0.1
Mar 2% 0 0.2
Apr 5% 0 0.6
May 15% 0 1.4
Jun 20% 0 2.5
Jul 11% 0 1.3
Aug 12% 0 1.3
Sep 9% 0 1.1
Oct 6% 0 0.8
Nov 6% 0 0.9
Dec 0% 0 0.1

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 2 0 0.3
Feb 0 0 0.3
Mar 2 0 0.5
Apr 5 0 1.5
May 15 0 3.6
Jun 20 0 6.4
Jul 11 0 3.3
Aug 12 0 3.3
Sep 9 0 2.8
Oct 6 0 2
Nov 6 0 2.3
Dec 0 0 0.3


Humidity and Wind

Grotto Bay has some very humid months, and high humidity throughout the year. The least humid month is November (71.7% relative humidity), and the most humid month is May (79.5%).

Wind in Grotto Bay is usually moderate. The windiest month is November, followed by December and January. November’s average wind speed of around 11.3 knots (13 MPH or 20.9 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid November where average top sustained speeds reach 17.8 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Grotto Bay.

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 10.2 Gentle breeze 15.6 Significant breeze
Feb 9.9 Gentle breeze 14.9 Significant breeze
Mar 8.9 Gentle breeze 13.9 Significant breeze
Apr 9.5 Gentle breeze 14.3 Significant breeze
May 7.5 Gentle breeze 11.7 Significant breeze
Jun 8.7 Gentle breeze 14 Significant breeze
Jul 9 Gentle breeze 13.4 Significant breeze
Aug 8.9 Gentle breeze 13.7 Significant breeze
Sep 9.3 Gentle breeze 14.4 Significant breeze
Oct 9.8 Gentle breeze 15.6 Significant breeze
Nov 11.3 Significant breeze 16.7 Significant breeze
Dec 10.4 Gentle breeze 15.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 74.7%
Feb 74.4%
Mar 77.9%
Apr 74%
May 79.5%
Jun 79.3%
Jul 72.1%
Aug 75.1%
Sep 75.1%
Oct 72.7%
Nov 71.7%
Dec 72.8%


Is it Safe to Travel to Grotto Bay?

Our best data indicates this area is somewhat safe. As of Dec 04, 2023 there are travel warnings for South Africa; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Nov 30, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Grotto Bay, South Africa is January, followed by February and November. 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 Grotto Bay in June. 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 65.4 in June means 65.4% of the tourists vs. January.



Overall Grotto Bay Travel Experience by Season

Fall (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 74.8°F (23.8°C) and 64.5°F (18.1°C) with colder temperatures in the later months. Rain is rare with 1 to 5 days of significant precipitation per month. Fall is the slowest for tourism, which makes it a good time for those looking for deals.

Winter (June through August)

The middle-year months have comfortably cool weather with high temperatures that are brisk. These months see the most precipitation with 4 to 6 days of precipitation per month. June – August is fairly slow season for tourism in Grotto Bay, so lodging and other accommodations may cost slightly less.

Spring (September through November)

Spring daily highs range from 71.3°F (21.8°C) and 64.4°F (18°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: 2 to 3 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.

Summer (December through February)

Weather is somewhat cool this time of year in Grotto Bay to be enjoyable for warm weather travelers. The average high during this season is between 75.7°F (24.3°C) and 70.6°F (21.4°C). On average, it rains or snows a very small amount: 0 to 1 times per month. These times of year are the busiest with tourists.


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