Boston is in for a classic early-summer Tuesday: mostly clear skies, comfy air, and a seasonable high near 77F after a cool start of about 61F at Logan Airport on June 16. Light north winds around 3 to 6 mph and a possible late-day sea breeze along the waterfront should make it a solid day for lunch breaks outside or an evening walk. Just do not be surprised if high tide makes some shoreline roads a little too close to the harbor for comfort.
Coastal Flooding Tonight
A Coastal Flood Statement remains in effect through late tonight and into early Wednesday morning, through about 4:00 a.m. on June 17, 2026. Forecasters warn that the highest astronomical tides could bring up to one foot of inundation in the lowest-lying shoreline spots.
According to the National Weather Service Boston/Norton, usual trouble spots such as Morrissey Boulevard and some North Shore coastal roads could see shallow ponding and splashover around the evening high tide. Drivers are urged to steer clear of any flooded stretches, with the agency reiterating: do not drive through flooded roadways.
What To Expect Today
Through the day Tuesday, June 16, 2026, expect plenty of sun and seasonable warmth, with highs near 77F. Winds will stay light out of the north early, then may turn onshore where a sea breeze takes hold this afternoon, especially near the harbor and along the immediate coast. Overall, conditions look friendly for outdoor plans, with no organized rain in the mix.
Thursday Outlook
Looking a bit ahead, Thursday is shaping up as the more active weather day. Forecasters are eyeing stronger southerly winds and scattered showers or thunderstorms, with gusts around 25 mph possible. The National Weather Service notes a moderate risk for Small Craft Advisory conditions on Thursday, so boaters and small-craft operators should keep tabs on updated marine forecasts and be ready to adjust plans.
Tips For Drivers And Boaters
For drivers, the game plan is simple: if you normally park on low-lying streets that tend to flood near high tide, move your vehicle to higher ground before this evening. Avoid driving through standing water, even if it looks shallow.
For mariners, check the latest marine forecast before heading out and be prepared to cut the trip short if winds increase or seas build more than expected. It may be worth planning an earlier return to port on Thursday rather than racing an incoming line of showers or stronger gusts.
Looking Ahead
Once Thursday’s front moves through, the stretch from Friday into Monday looks mainly dry, with warm afternoons in the mid-70s to low-80s and comfortable humidity. That sets up a pretty appealing Juneteenth weekend across the region.
Coastal visitors should still keep an eye on updated forecasts, tides, and wind trends, since even minor shifts in timing or strength can change local impacts along the shore.
