Portsmouth, RI Weather Tomorrow

Before heading out, check tomorrow's Portsmouth weather and the extended 5 day forecast featuring precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction across the Portsmouth area and around Newport county, Rhode Island.
Updated: Wed Oct 28th 2026 7:30 PM EDT
Portsmouth, RI Weather – 10-28 – Overcast
54° / 42°
Overcast
In Portsmouth, it will be overcast with highs near 54°F and lows around 42°F. There might be light rainfall having a 12% chance. Winds will be light at 9mph and gusts of 11.9mph at 10 PM. The humidity will be on the higher side, averaging about 70%, the maximum being 78% at 9 PM and 76% being its lowest at 8 PM. Barometric pressure is its highest of 30.41inHg at 8 PM, a lowest point of 30.38inHg at 11 PM with an avg 30.4inHg.
Portsmouth, RI Weather – 10-29 – Sunny
61° / 52°

Weather Tomorrow

Sunny
Highs will reach 61°F with lows near 52°F in Portsmouth, where a sunny day is. There's a very small chance of rainfall, only about 10%. Wind will be moderate, blowing around 16mph on average and gusts of 29.8mph at 10 PM. High humidity with average of 81% is anticipated, the maximum being 90% at 9 PM and 71% being its lowest at 12 PM. Barometric pressure is its highest of 30.36inHg at 12 AM, a lowest point of 30.07inHg at 11 PM with an avg 30.22inHg.
Portsmouth, RI Weather – 10-30 – Sunny
67° / 49°
Sunny
In Portsmouth, it will be sunny with highs near 67°F and lows around 49°F. There might be light rainfall having a 17% chance with an estimated 0in. Winds will be strong at speeds peaking at 21mph and gusts of 32mph at 4 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 92% at 12 AM and 49% being its lowest at 3 PM. Barometric pressure is its highest of 30.2inHg at 10 PM, a lowest point of 29.97inHg at 2 PM with an avg 30.05inHg.
Portsmouth, RI Weather – 10-31 – Sunny
54° / 44°
Sunny
Portsmouth may see a sunny day, with daytime highs of 54°F and overnight lows near 44°F. There's a very small chance of rainfall, only about 5%. Wind will be moderate, blowing around 14mph on average and gusts of 25.1mph at 12 AM. Humidity levels should be comfortable, sitting around 57% on average, the maximum being 72% at 5 AM and 36% being its lowest at 4 PM. Barometric pressure is its highest of 30.44inHg at 10 PM, a lowest point of 30.22inHg at 12 AM with an avg 30.35inHg.
Portsmouth, RI Weather – 11-1 – Overcast
58° / 44°
Overcast
Portsmouth may see overcast, with daytime highs of 58°F and overnight lows near 44°F. There's a very small chance of rainfall, only about 10%. Wind will be moderate, blowing around 12mph on average and gusts of 16.1mph at 5 PM. The humidity will be on the higher side, averaging about 64%, the maximum being 84% at 10 PM and 53% being its lowest at 2 PM. Barometric pressure is its highest of 30.46inHg at 7 AM, a lowest point of 30.34inHg at 11 PM with an avg 30.4inHg.
Portsmouth, RI Weather – 11-2 – Partly Cloudy
59° / 50°
Partly Cloudy
Overcast conditions are in the forecast for Portsmouth, with a high of 59°F and a low of 50°F. There might be light rainfall having a 15% chance with an estimated 0in. Winds will be light at 10mph and gusts of 18.1mph at 1 PM. High humidity with average of 81% is anticipated, the maximum being 90% at 7 AM and 72% being its lowest at 1 PM. Barometric pressure is its highest of 30.33inHg at 12 AM, a lowest point of 30.23inHg at 3 PM with an avg 30.27inHg.

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