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Geonivora
Island

Trethias Island

Located in St. Merryn, Cornwall Coordinates: 50°31′35″ N 5°01′41″ W

Map showing the location of Trethias Island Trethias Island
Location in United Kingdom
Nearest town
Treyarnon
0.8 km E
Local time
UTC+00:00
Europe/London · UTC+00:00
When to go
June–September
See the climate
Airports
NQY Cornwall Airport Newquay10 km
EXT Exeter International Airport117 km

About Trethias Island

Trethias Island is an island. Location: St. Merryn, Cornwall. The best months to visit are June–September. The nearest airport is Cornwall Airport Newquay (10 km). Nearby sights include Treyarnon Bay and Constantine Bay.

Climate of Trethias Island

Best months for sightseeing

Best months for sightseeing: June–September.

This month · November

A wet month

Day 12° · Night 7° · Rain 112 mm

Hottest month
August (day 19°)
Coldest month
February (night 4°)
Wettest month
November (112 mm)
Driest month
May (50 mm)

Bars: average monthly low and high temperature. Below: precipitation. Monthly averages for 1970–2000 at about 18 km resolution, adjusted for elevation. Highlighted months are mild and relatively dry. Source: WorldClim 2.1 (CC BY 4.0).

Show values as a table
Climate of Trethias Island
Month JanFebMarAprMayJunJulAugSepOctNovDec
Average high (°C)9°9°10°12°14°17°19°19°17°15°12°10°
Average low (°C)5°4°5°6°9°11°13°13°12°10°7°6°
Precipitation (mm)108797254505750688096112107

Other places to visit in this season: June July August September

How to get to Trethias Island

The nearest airport is Cornwall Airport Newquay (NQY), 10 km to the south as the crow flies. For international flights: Cardiff International Airport (CWL) (153 km). The nearest large city is Plymouth, 65 km to the east.

Airports

  • Cornwall Airport Newquay (NQY) Newquay 10 kmsouth
  • Exeter International Airport (EXT) Exeter, Devon 117 kmeast
  • Cardiff International Airport (CWL) Cardiff 153 kmnortheast

Nearby large cities

  • Plymouth Population: 260.2K 65 kmeast
  • Exeter Population: 130.7K 108 kmeast
  • Swansea Population: 300.4K 144 kmnortheast
  • Cardiff Population: 372.1K 168 kmnortheast
  • Newport Population: 161.5K 185 kmnortheast

Straight-line distances; road distances are longer. Airport data: OurAirports.

Day trips from Trethias Island

Within 100 km: 135 historic and cultural sites, 598 natural sites, 114 lakes, rivers and coasts.

0–25 km121 places

  • Perranporth Beach Beach 22 kmSW
  • Holywell Bay Beach Beach 17 kmSW
  • Poly Joke Beach Beach 16 kmSW
  • Crantock Beach Beach 15 kmSW

25–60 km276 places

  • Tregantle Beach Beach 57 kmE
  • Lansallos Beach Beach 39 kmSE
  • Vault Beach Beach 37 kmSE
  • Gylly Beach Beach 43 kmS

60–100 km450 places

  • Burgh Island Island 85 kmE
  • Sennen Cove Beach 69 kmSW
  • Saunton Sands Beach 85 kmNE
  • Gara Rock beach Beach 97 kmE

Straight-line distances.

Nearest towns and villages

Nearby attractions & nature

Everything nearby

Sources & licences

Data last updated: