Warm but cloudy Tuesday in Poole, with rain possible later
18 August 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
Tuesday brings a warm but overcast day to Poole, with temperatures climbing to a high of 26°C and overnight lows of around 16°C — comfortable enough for late summer, even without much sunshine breaking through.
The main thing to be aware of is a meaningful chance of rain. While an earlier forecast put the probability at 14%, a later update from the Met Office flags a 73% chance of rain, with heavy downpours possible at some point during the day. Given that spread, it is worth having a jacket or umbrella to hand if you are heading out, particularly for anything planned outdoors in the afternoon or evening.
The UV index sits at 5 — classed as moderate — so if the clouds do thin and the sun makes an appearance, a little sun cream is still a sensible precaution, especially for children spending time outside.
For anyone with plans on or near the water — Poole Harbour, Sandbanks or the quay — it is a day to keep an eye on conditions and check the latest Met Office update before setting out. The warmth is genuine, but so is the rain risk.