May in Portland, ME: shoulder season for golf — playable with smart tee time selection. Best tee times: late morning to early afternoon after dew burns off.
| Average May Weather | |
|---|---|
| Avg daily high | 64°F |
| Avg daily low | 47°F |
| Rainy days | 11 / mo |
| Avg peak wind | 11.2 mph |
The defining variable in May for Portland, Maine is precipitation frequency — or rather, the sudden drop in it. At just 11 rainy days, May ties for the second-driest month of the year, a meaningful shift after April's 14 precip days. That drier window opens up more reliable morning tee times and reduces the odds of a round getting cut short.
Temperatures climb to a 64F average high, a full 12 degrees above April, though the 47F average low means early-morning rounds can still feel raw. A 17-degree daily swing is worth planning around: what starts as a two-layer morning can turn into a single shirt by the back nine. Peak winds sit at 11.2 mph — not calm, but measurably quieter than April — so afternoon conditions on Portland's exposed coastal layouts are generally manageable.
With May tied for the second-fewest precipitation days of the year, booking a few days in advance rather than last-minute is usually sufficient — course saturation from April should clear by early May, keeping fairway conditions firm. That said, the 47F average low means early-morning slots before 8 AM can be uncomfortably cold; mid-morning tee times offer the best trade-off between availability and playable temperatures. See how conditions rate hour by hour on our playability scale.
May is noticeably drier than both its neighbors: April averages 14 precip days and June climbs back up to 14 as well, making May's 11-day figure the clearest reason to prioritize this window. Temperatures land between the two months — 12F warmer than April's 52F high but 9F cooler than June's 73F — so expect comfortable but not warm afternoons. Wind drops 1.4 mph from April and eases another 0.9 mph heading into June, meaning June is slightly calmer, but the difference is marginal.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for Portland, ME for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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May is one of Portland's more reliable months on the course, tied for the second-fewest precipitation days of the year at just 11. The average high of 64F sits in a comfortable range for most golfers, though the 47F average low means early tee times call for extra layers. Wind averages 11.2 mph at peak, which is manageable but worth factoring in on open coastal holes.
The average low in May is 47F, which is most relevant for tee times in the first few hours after sunrise. By the time the average high of 64F is reached in the afternoon, conditions feel genuinely comfortable. The 17-degree daily swing is larger than most months, so dressing in layers is the practical approach rather than simply checking the midday forecast.