Best time to visit Saint-Malo
Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.
Default 29 °C is the Beach Climate Index "bathtub" line (Morgan et al.) — where the sea stops being refreshing and starts feeling like a warm bath.
How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.
Compare with another destination
Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.
Tours in Saint-Malo
12 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Saint-Malo).
- 1
Saint-Malo: 1h30 guided boat trip (Commented FR & EN) - 2
One hour boat trip with a local (Commented FR & EN) - 3
Normandy 2Days Trip Landing Beaches and Mont St Michel from Paris - 4
3 Days Trip to Normandy, Loire and Mont Saint Michel from Paris - 5
Saint Malo and Saint Servan in vintage sidecar with driver - 6
3Day Normandy Mt Saint-Michel & Loire Valley Castles with Pick up - 7
The Hardest City to Invade: Saint Malo's Secrets Audio Guide - 8
Day trip with local driver to Mt Saint-Michel Cancale and Saint-Malo from Rennes - 9
Private Interactive Game and Walking Tour in Saint Malo - 10
Normandy Landing Beaches 2 Days Trip with Pick-Up from Paris - 11
Private 2-hour Walking Tour of Saint Malo with private official tour guide - 12
Historic Saint-Malo Self-Guided Audio-immersive Walking Tour
Last refreshed 2026-08-13.
Similar climatesDeauville95% · Ostend94% · Brighton93%
Other destinations with the most-alike year-round climate to Saint-Malo (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Saint-Malo's. Based on the 2020-2024 climatology, not this year's actual weather.
Month-by-month
| Month | Temp °C | Feels °C | Rain days | Rain h | Rain h/day | Humidity | Wind km/h | Sun h | UV | Interest | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 5–9 | 5 | 16 | 179 | 11.2 | 81% | 28 | 107 | 1 | Quiet | 5 |
| Feb | 6–11 | 7 | 12 | 140 | 11.7 | 78% | 30 | 113 | 1 | Quiet | 5 |
| Mar | 7–12 | 8 | 16 | 159 | 9.9 | 74% | 28 | 184 | 3 | Quiet | 6 |
| Apr | 8–14 | 11 | 10 | 108 | 10.8 | 71% | 26 | 230 | 4 | Quiet | 7 |
| May | 11–16 | 14 | 12 | 128 | 10.7 | 71% | 26 | 270 | 5 | Quiet | 7 |
| Jun | 14–19 | 18 | 12 | 142 | 11.8 | 74% | 23 | 270 | 6 | Moderate | 7 |
| Jul | 16–21 | 19 | 10 | 128 | 12.8 | 72% | 25 | 273 | 6 | Busy | 8 |
| Aug | 17–21 | 21 | 11 | 122 | 11.1 | 72% | 24 | 254 | 5 | Peak | 8 |
| Sep | 15–20 | 19 | 12 | 136 | 11.3 | 73% | 24 | 207 | 4 | Moderate | 7 |
| Oct | 12–17 | 15 | 15 | 161 | 10.7 | 77% | 28 | 166 | 2 | Moderate | 6 |
| Nov | 9–13 | 10 | 14 | 171 | 12.2 | 79% | 30 | 118 | 1 | Quiet | 5 |
| Dec | 7–10 | 6 | 17 | 209 | 12.3 | 82% | 31 | 92 | 1 | Quiet | 4 |
UV Index in Saint-Malo by Month
UV index in Saint-Malo peaks at 6 (high) in June, dropping to 1 (low) in January. June have high UV — SPF 30+ and sunglasses recommended.
Best months in detail
August
8/1017–21°C · 11 rain days (122h) · 254 sun hours · 72% humidity · Peak crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
July
8/1016–21°C (feels 19°C) · 10 rain days (128h) · 273 sun hours · 72% humidity · Busy crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 7 (high)
April
7/108–14°C (feels 11°C) · 10 rain days (108h) · 230 sun hours · 71% humidity · Quiet crowd · UV 4 (moderate)
Every month
Show the other 9 months in detail
January
5/105–9°C (feels 5°C) · 16 rain days (179h) · 107 sun hours · 81% humidity · Quiet crowd · UV 1 (low)
February
5/106–11°C (feels 7°C) · 12 rain days (140h) · 113 sun hours · 78% humidity · Quiet crowd · UV 1 (low)
March
6/107–12°C (feels 8°C) · 16 rain days (159h) · 184 sun hours · 74% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
May
7/1011–16°C (feels 14°C) · 12 rain days (128h) · 270 sun hours · 71% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
June
7/1014–19°C (feels 18°C) · 12 rain days (142h) · 270 sun hours · 74% humidity · Moderate crowd · UV 6 (high)
September
7/1015–20°C (feels 19°C) · 12 rain days (136h) · 207 sun hours · 73% humidity · Moderate crowd · UV 4 (moderate)
October
6/1012–17°C (feels 15°C) · 15 rain days (161h) · 166 sun hours · 77% humidity · Moderate crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)
November
5/109–13°C (feels 10°C) · 14 rain days (171h) · 118 sun hours · 79% humidity · Quiet crowd · UV 1 (low)
December
4/107–10°C (feels 6°C) · 17 rain days (209h) · 92 sun hours · 82% humidity · Quiet crowd · UV 1 (low)
Frequently asked questions about visiting Saint-Malo
When is the best time to visit Saint-Malo?
August is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 17–21°C (11 rainy days). The top three months by score are August, July, April.
What is the worst time to visit Saint-Malo?
December is the lowest-scoring month (4/10). Typical conditions: 7–10°C (17 rainy days).
When are crowds lowest in Saint-Malo?
Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in August. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.
Which months in Saint-Malo have good weather but fewer tourists?
April (climate 7/10, crowd index 30) and May (climate 7/10, crowd index 38) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Saint-Malo by month?
UV peaks at 6 (high) in June and is lowest in January at 1 (low). Monthly peak values: Jan 1, Feb 1, Mar 3, Apr 4, May 5, Jun 6, Jul 6, Aug 5, Sep 4, Oct 2, Nov 1, Dec 1.
What is the UV index in Saint-Malo in June?
June is the peak UV month in Saint-Malo, with a daily-peak UV index of 6 (high). Apply SPF 30+, wear sunglasses, and seek shade during midday hours.
How high can UV get in Saint-Malo on the sunniest days?
Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. July is the worst case: typical days average UV 6 (moderate), but the top 10% of days reach UV 7 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, May, July, August, October. Plan sun protection for the worst case, not the average.
Is air quality in Saint-Malo bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 4 months: January, February, March, December. The worst month is February with a typical-day mean of 9 µg/m³ (fair); on the worst 10% of days PM2.5 reaches 18 µg/m³ (unhealthy for sensitive) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.