The best times to visit Guernsey for ideal weather are

May 21st to October 21st

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

 

 


Other Guernsey Travel Info

Weather in Guernsey

Temperature

Average temperatures in Guernsey vary somewhat. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a low chance of precipitation most of the year. The area is somewhat temperate — in the 50th 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 Guernsey, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 67.5°F (19.7°C) with temperatures rarely dropping below 58.2°F (14.6°C) at night.

Guernsey Temperatures (Fahrenheit)

Key
High
Average
Low

Guernsey Temperatures (Celsius)

Key
High
Average
Low

“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.

Guernsey Perceived Temperature (F)

Key
High
Average
Low

Guernsey Perceived Temperature (C)

Key
High
Average
Low

 

Average Guernsey 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 47.7 45.3 42.3
Feb 47.2 44.5 41.3
Mar 49.6 46.2 42.5
Apr 54 49.9 45.5
May 57.7 53.7 49.7
Jun 62.3 58.1 53.7
Jul 65.8 61.5 57.2
Aug 65.6 61.8 57.9
Sep 63.7 60 55.9
Oct 59.3 56.4 53
Nov 53.7 51.3 48.5
Dec 49.3 46.9 44

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 8.7 7.4 5.7
Feb 8.4 6.9 5.2
Mar 9.8 7.9 5.8
Apr 12.2 9.9 7.5
May 14.3 12.1 9.8
Jun 16.8 14.5 12.1
Jul 18.8 16.4 14
Aug 18.7 16.6 14.4
Sep 17.6 15.6 13.3
Oct 15.2 13.6 11.7
Nov 12.1 10.7 9.2
Dec 9.6 8.3 6.7

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Guernsey are June, September, and then April. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early April. For example, on the week of April 2nd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early December with an average of 2 days of significant precipitation the week of December 3rd.

When can you find snow in Guernsey? Weather stations report a good amount of seasonal snow likely to be deepest around March, especially close to early March. The best time to ski (if at all) in Guernsey is often around around March 5th when fresh powder is deepest. 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 Guernsey.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 19% 0.7 2.5
Feb 16% 1.1 1.5
Mar 11% 3.4 1.1
Apr 8% 0 1.2
May 10% 0 1.2
Jun 8% 0 1
Jul 10% 0 1.3
Aug 11% 0 1.2
Sep 8% 0 1.2
Oct 16% 0 1.7
Nov 20% 0.7 2.3
Dec 20% 2.1 2.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 19 1.8 6.4
Feb 16 2.8 3.8
Mar 11 8.6 2.8
Apr 8 0 3
May 10 0 3
Jun 8 0 2.5
Jul 10 0 3.3
Aug 11 0 3
Sep 8 0 3
Oct 16 0 4.3
Nov 20 1.8 5.8
Dec 20 5.3 6.1

 

Humidity and Wind

Guernsey has some extremely humid months, and high humidity throughout the year. The least humid month is December (77.2% relative humidity), and the most humid month is August (81.9%).

Wind in Guernsey is usually stronger than many places. The windiest month is December, followed by January and November. December’s average wind speed of around 14.7 knots (16.9 MPH or 27.2 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 early December where average top sustained speeds reach 21.8 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

Key
Avg. Relative Humidity

Wind

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

Key
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 13.9 Significant breeze 20 Strong breeze
Feb 13 Significant breeze 18.4 Strong breeze
Mar 12 Significant breeze 17.1 Strong breeze
Apr 10.5 Gentle breeze 15.1 Significant breeze
May 10.9 Gentle breeze 15.7 Strong breeze
Jun 10.1 Gentle breeze 14.8 Significant breeze
Jul 10.2 Gentle breeze 14.6 Strong breeze
Aug 9.8 Gentle breeze 14.2 Significant breeze
Sep 10.5 Gentle breeze 14.9 Strong breeze
Oct 11.6 Significant breeze 16.5 Significant breeze
Nov 13.7 Significant breeze 19.6 Strong breeze
Dec 14.7 Significant breeze 20.9 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 79.8%
Feb 80%
Mar 79.2%
Apr 78.3%
May 80.3%
Jun 80.2%
Jul 80.6%
Aug 81.9%
Sep 78.4%
Oct 79.1%
Nov 78.7%
Dec 77.2%

 

Is it Safe to Travel to Guernsey?

Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for the United Kingdom; 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 Sep 06, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Guernsey is July, followed by June and August. 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 Guernsey 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

Key
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 very reliable. Displayed data is calculated relative to the peak, so a score of 33.2 in October means 33.2% of the tourists vs. July.

 

 

Overall Guernsey Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 60.2°F (15.7°C) and 48°F (8.9°C) with warmer temperatures in the later months. Rain is rare with roughly 3 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 comfortably cool weather with high temperatures that are comfortable. These months see the least precipitation with 2 to 3 days of precipitation per month. June – August is the busiest season for tourism in Guernsey, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 65°F (18.3°C) and 50.2°F (10.1°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 2 to 6 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 Guernsey to be enjoyable for warm weather travelers. The average high during this season is between 50.4°F (10.2°C) and 45.5°F (7.5°C). On average, it rains or snows a fair amount: 5 to 6 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel › Guernsey