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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the WordPatch weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above before heading out, as Porthleven’s coastal weather can shift quickly – the mix of Atlantic fronts and local shelter makes conditions distinct even within Cornwall. The best months are May to September for warmth and lighter winds, though July and August see higher prices and crowds around the harbour.
What’s typical for Porthleven weather?
Porthleven enjoys a mild maritime climate. Winters are cool (average highs around 9°C) and wet, but snow is rare. Summers rarely exceed 22°C, kept fresh by sea breezes. The most reliable sunshine runs from April to early June, before the holiday rush. If you’re checking bbc weather porthleven or accuweather porthleven, remember that wind from the south-west can bring sudden showers even on a sunny day. For detailed timing, look at porthleven weather hourly data in the live forecast above.
Best months to visit and what to pack
For a balance of good weather and value, aim for late May, June or September. School holidays push prices up in August. Pack layers – a waterproof jacket is essential year-round. Even in summer, add a fleece for evenings. For walkers, sturdy shoes help on the coastal path. If you’re using a porthleven webcam to check conditions live, you’ll often see the harbour sheltering boats from the worst of the swell.
How accurate is the 14-day forecast for Porthleven?
The porthleven weather 14 days outlook from the Met Office gives a general trend, but confidence drops after day 7. For immediate plans, rely on the live forecast above and check weather in porthleven tomorrow for more precise timing.
When do spring tides affect the harbour?
Spring tides bring higher water levels, sometimes flooding the car park near the pier. These occur around new and full moons. Check local tide tables and the 21 day weather porthleven met office forecast to plan around any coastal flooding risks.
Sources
For more on regional conditions, see the UK weather hub or check the 10 Day Weather Forecast UK before you travel.