Porthmadog 14-Day Forecast
Gwynedd, Wales
Porthmadog Outlook (Next 14 Days)
Around Porthmadog, a breeze at times adds to the feel, with persistent rain affecting the area throughout. Temperatures sit pleasant overall.
Through the next stretch, it’s the overall regime that matters most: a wetter-leaning pattern overall, with pleasant temperatures generally in place. Further out, the forecast is best read as the dominant pattern and its swings, rather than a precise day-by-day script. As the wider pattern evolves, the detail can adjust between updates, even when the overall direction stays the same. A quick scan of the charts gives the best sense of the regime, while the table helps with day-specific decisions.
Daily Forecast
| Date | High | Low | Condition | Wind | Rain % | Humidity | Visibility | UV | Sunrise | Sunset |
|---|---|---|---|---|---|---|---|---|---|---|
| Thu, 4 Jun | 14°C | 11°C | Moderate rain | 40 km/h | 94% | 89% | 9 km | 4 | 04:54 AM | 09:34 PM |
| Fri, 5 Jun | 13°C | 9°C | Patchy rain nearby | 31 km/h | 73% | 79% | 10 km | 6 | 04:54 AM | 09:35 PM |
| Sat, 6 Jun | 14°C | 10°C | Moderate rain | 33 km/h | 94% | 87% | 8 km | 2 | 04:53 AM | 09:36 PM |
| Sun, 7 Jun | 16°C | 10°C | Patchy rain nearby | 30 km/h | 86% | 89% | 10 km | 5 | 04:53 AM | 09:37 PM |
| Mon, 8 Jun | 13°C | 10°C | Heavy rain | 42 km/h | 95% | 89% | 9 km | 3 | 04:52 AM | 09:38 PM |
| Tue, 9 Jun | 13°C | 9°C | Patchy rain nearby | 31 km/h | 73% | 82% | 10 km | 3 | 04:52 AM | 09:39 PM |
| Wed, 10 Jun | 15°C | 10°C | Moderate rain | 44 km/h | 92% | 88% | 10 km | 3 | 04:51 AM | 09:40 PM |
| Thu, 11 Jun | 15°C | 8°C | Patchy rain nearby | 19 km/h | 73% | 81% | 9 km | 3 | 04:51 AM | 09:41 PM |
| Fri, 12 Jun | 14°C | 11°C | Patchy rain nearby | 49 km/h | 85% | 86% | 10 km | 3 | 04:51 AM | 09:41 PM |
| Sat, 13 Jun | 16°C | 10°C | Patchy rain nearby | 23 km/h | 73% | 79% | 10 km | 3 | 04:50 AM | 09:42 PM |
| Sun, 14 Jun | 14°C | 9°C | Patchy rain nearby | 37 km/h | 82% | 87% | 8 km | 3 | 04:50 AM | 09:43 PM |
| Mon, 15 Jun | 14°C | 9°C | Patchy rain nearby | 19 km/h | 73% | 83% | 10 km | 3 | 04:50 AM | 09:43 PM |
| Tue, 16 Jun | 14°C | 11°C | Moderate rain | 36 km/h | 97% | 95% | 8 km | 3 | 04:50 AM | 09:44 PM |
| Wed, 17 Jun | 14°C | 13°C | Patchy rain nearby | 17 km/h | 96% | 95% | 7 km | 3 | 04:50 AM | 09:44 PM |
Temperature Trend
Rain Probability
Wind Speed
UV Index
Forecast context and reference links
To plan confidently, separate what is likely from what is uncertain. Use the supporting guides to understand why the outlook is behaving the way it is for Porthmadog.
- Wales Climate for regional patterns and seasonal tendencies.
- UK Climate Overview for a national baseline and how regions compare.
- Wales for location browsing and regional navigation.
How to interpret confidence
For how forecast reliability changes with lead time, see Forecast Confidence. For transparency on how WeatherEngland sources and updates data, see Methodology.
Background guides
- UK Weather Patterns
- UK Seasonal Weather
- UK Weather Hazards
- UK Weather Safety
- UK Jet Stream
- UK Microclimates
Glossary support
Start with the Weather Glossary. Useful terms for this page include Jet Stream, Air Mass, Zonal Flow, Atmospheric Blocking, Weather Front, and Pressure Trend.
FAQ
What is the 14-day weather forecast for Porthmadog?
Over the next 14 days in Porthmadog, the day-to-day pattern is led most often by Patchy rain nearby as the headline condition. Temperatures hold fairly steady overall. Typical range: highs up to 16°C, lows down to 8°C. Rain-risk signal: 97% at peak (14 higher-risk days). Wind: a windiest-day signal around 49 km/h. UV: peaks around 6 on brighter days. Confidence is highest early on; later in the period, look for the trend and regime rather than hour-by-hour precision.
How accurate is the 14-day forecast for Porthmadog?
Short-range detail is usually strongest early on. Later in the period, the forecast is best read as a trend signal: direction of temperatures, how changeable it looks, and whether winds/rain are more likely to feature.
Can I see hour-by-hour detail for Porthmadog today?
Yes — near-term hourly detail is available for today, alongside day-by-day summaries across the full 14-day window. Use the hourly view for timing windows; use the daily table for the broader run of weather.
How do temperatures change in Porthmadog across the next 14 days?
The broader temperature signal for Porthmadog is: Temperatures hold fairly steady overall. The chart gives the best read of whether that drift is meaningful or just day-to-day noise.
What does the ‘headline condition’ mean in the Porthmadog forecast?
It’s a top-line description of what is most likely to characterise the day. In the UK, the detail can move around, so the charts help show whether it is a brief spell or a more persistent feature.