June in Portsmouth averages a daily high of 29.2°C with nights around 19.2°C. Expect roughly 10.5 wet days totalling 128.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Portsmouth is April–May.
Based on NORFOLK SOUTH, VA US (7.3km), 1995–2024. 21 years of June data.