GrimsayThings to Do
When to Go
Best Time to Visit Grimsay
Summer for the warmest temperatures and longest daylight; shoulder seasons for fewer visitors.
Summer
Jun-Aug · 10-15°C (50-59°F)
Mildest weather and the best time for birdwatching and boating; daylight is long.
Late Spring/Early Autumn
May, Sep · 8-13°C (46-55°F)
Fewer midges than peak summer and quieter harbours for exploring.
Weather & Climate near Grimsay
Climate
Continental climate with cool summers (peaking in July) and cold winters (coldest in February). Temperatures range from 3°C to 16°C. Abundant rainfall (1402 mm/year), wettest in October.
Air Quality:
AQI 21
Good
Best Time to Visit
JulyAugustMay
Temperature & Rainfall
Temperature Range
20°
Warmest Month
0°
Coldest Month
Monthly Conditions
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Poor | 3° - 7° | 1° | 150 mm | overcast | 82% | 8.1 m/s | 0.0 low | 7.1h |
| February | Poor | 3° - 8° | 0° | 109 mm | overcast | 81% | 8.1 m/s | 0.1 low | 9.2h |
| March | Poor | 4° - 8° | 2° | 121 mm | overcast | 82% | 7.7 m/s | 0.3 low | 11.6h |
| April | Acceptable | 5° - 10° | 4° | 76 mm | overcast | 83% | 6.7 m/s | 0.6 moderate | 14.1h |
| May | Acceptable | 7° - 13° | 7° | 63 mm | overcast | 84% | 6.0 m/s | 1.0 moderate | 16.4h |
| June | Acceptable | 10° - 15° | 12° | 75 mm | overcast | 86% | 6.1 m/s | 1.2 high | 17.6h |
| July | Good | 11° - 16° | 14° | 90 mm | overcast | 87% | 5.6 m/s | 1.1 high | 17.0h |
| August | Acceptable | 11° - 16° | 14° | 104 mm | overcast | 86% | 5.5 m/s | 0.8 moderate | 15.0h |
| September | Poor | 10° - 15° | 12° | 138 mm | overcast | 85% | 6.4 m/s | 0.5 low | 12.6h |
| October | Poor | 8° - 12° | 7° | 163 mm | overcast | 83% | 7.2 m/s | 0.2 low | 10.1h |
| November | Poor | 5° - 9° | 3° | 160 mm | overcast | 81% | 7.3 m/s | 0.0 low | 7.8h |
| December | Poor | 4° - 8° | 1° | 153 mm | overcast | 81% | 7.5 m/s | 0.0 low | 6.4h |
Getting There & Around
How to Get to Grimsay
Access is by causeway from Benbecula (in the Outer Hebrides) or by local ferry services that connect the small islands. Check local ferry timetables and weather before travel.
Tips for Visiting Grimsay
- Hire a local boat for flexible crossings rather than relying on infrequent ferries.
- Explore the machair (sea grass plains) for wildflowers in late spring; the island's birdlife is concentrated in low dunes and tidal flats.
- Bring cash - facilities are minimal and shops are sporadic.