5-day weather forecast Boston 18-06-2026
Weather forecast Boston Thursday, June 18 18.06.2026: sunny, temperature from 17 °C to 29 °C.
Precipitation probability 42%. Wind up to 8.5 m/s (gusts 10.44 m/s). Air humidity 49–98%, atmospheric pressure 750–759 mm Hg, UV index up to 8.
Weather Alerts
Hide alertsCoastal Flood Statement issued June 13 at 2:00PM EDT until June 16 at 4:00AM EDT by NWS Boston/Norton MA
Coastal Flood Statement
* WHAT...Up to one foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways (2.9 to 13.0 feet Mean Lower Low Water) around the
evening high tides.
* WHERE...Eastern Essex MA, Suffolk MA, Eastern Norfolk MA,
Eastern Plymouth MA, Barnstable MA and Dukes MA Counties.
* WHEN...From 9 PM EDT this evening through late Monday night.
The evening high tide periods tonight, Sunday night and Monday
night are of the greatest concern.
* IMPACTS...Shallow pockets of flooding less than one foot deep
affects the lowest lying areas along the coast, including
Morrissey Boulevard in Boston. Most roads remain passable.
Flooding up to one foot deep affects coastal roads on the
North Shore from Salem to Gloucester and Newburyport. Rough
surf will cause flooding on some coastal roads around the time
of high tide due to splashover.
Do not drive through flooded roadways.
Coastal Flood Statement issued June 13 at 2:00PM EDT until June 16 at 2:00AM EDT by NWS Boston/Norton MA
Coastal Flood Statement
* WHAT...Up to one half foot of inundation above ground level
expected in low-lying areas near shorelines and tidal
waterways (4.4 to 7.2 feet Mean Lower Low Water) around the
evening high tides.
* WHERE...Washington, Southern Bristol MA, Southern Plymouth MA,
Southeast Providence RI, Eastern Kent RI, Bristol RI, and
Newport RI Counties.
* WHEN...From 6 PM EDT this evening through late Monday night.
The evening high tide periods tonight, Sunday night and
Monday night are of the greatest concern.
* IMPACTS...Minor coastal flooding occurs along the most
vulnerable shoreline locales in Newport, Portsmouth and
Middletown. This includes flooding at parking lots near
beaches in Newport, and a portion of Hazard Road. Minor
coastal flooding also occurs on several streets in the Common
Fence Point area.
Do not drive through flooded roadways.
Beach Hazards Statement issued June 13 at 8:01PM EDT until June 14 at 8:00PM EDT by NWS Gray ME
Beach Hazards Statement
* WHAT...Warm air temperatures in the 80s to near 90 may cause
people to underestimate the dangers of the cold water
temperatures in the upper 50s and lower 60s.
* WHERE...In Maine, Coastal York, Coastal Cumberland, Sagadahoc,
Lincoln, Knox and Coastal Waldo Counties. In New Hampshire,
Coastal Rockingham County.
* WHEN...From Sunday morning through Sunday evening.
* IMPACTS...The cold water temperatures can quickly cause
hypothermia to anyone immersed in the water. When the water
temperature is below 60 degrees, the average submerged person
could lose dexterity within minutes and be unable to accomplish
simple tasks. Anyone on boats or paddlecraft should use extreme
caution to avoid this threat.
A Beach Hazards Statement is issued on days when a significant
number of boats and paddlecraft are expected to be out on the
water and when warm air temperatures may cause people to
underestimate the danger of the cold water. Paddle smart from the
start. Always wear your life jacket. Be aware of wind conditions,
tides, and localized currents.
All boaters and paddlers are highly encouraged to contact the
U.S. Coast Guard Auxiliary or U.S. Power Squadrons at
https://cgaux.org/vsc/ to receive a FREE vessel check. This is a
convenient, no consequence way to ensure your vessel is outfitted
with all required safety equipment. Additionally, please label
your paddlecraft with your contact information (IF FOUND Sticker)
in the event it is found adrift on the water.
Sunrise 05:07
Sunset 20:23
Sunset 20:23
Waxing Crescent19% illuminated
Moonrise 08:41 · Moonset 23:25
Moonrise 08:41 · Moonset 23:25
Chart
Table
Thu, Jun 18, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Fog | 18 °C | 42% | 100% | 98% | 757 mm Hg | SSW 196° 2.5 (4.25) m/s | 0 |
| 01:00 | Fog | 18 °C | 40% | 100% | 98% | 757 mm Hg | SSW 205° 2.39 (4) m/s | 0 |
| 02:00 |  Patchy rain possible | 18 °C | 25% (0.02 mm/hr) | 74% | 88% | 759 mm Hg | SSW 199° 4.61 (6.78) m/s | 0 |
| 03:00 |  Mist | 17 °C | 36% | 88% | 96% | 758 mm Hg | WSW 246° 1.69 (2.64) m/s | 0 |
| 04:00 | Fog | 18 °C | 40% | 100% | 97% | 757 mm Hg | SW 219° 1.11 (1.83) m/s | 0 |
| 05:00 |  Overcast | 18 °C | 31% | 100% | 88% | 757 mm Hg | S 184° 5.11 (7.53) m/s | 0 |
| 06:00 |  Mist | 18 °C | 37% | 98% | 96% | 757 mm Hg | SE 144° 1.39 (2.11) m/s | 0.1 |
| 07:00 |  Overcast | 20 °C | 27% | 94% | 93% | 758 mm Hg | SSE 154° 1.69 (2.33) m/s | 0.5 |
| 08:00 | Overcast | 20 °C | 27% | 100% | 81% | 755 mm Hg | S 178° 6.39 (8.36) m/s | 0.6 |
| 09:00 |  Patchy rain possible | 19 °C | 24% (0.01 mm/hr) | 83% | 84% | 757 mm Hg | SSE 150° 2.19 (2.86) m/s | 4 |
| 10:00 | Patchy rain possible | 21 °C | 32% (0.14 mm/hr) | 74% | 93% | 756 mm Hg | ESE 115° 2.5 (3.89) m/s | 4 |
| 11:00 | Patchy rain possible | 20 °C | 21% (0.01 mm/hr) | 62% | 78% | 752 mm Hg | S 178° 7.61 (10.44) m/s | 5 |
| 12:00 |  Light drizzle | 20 °C | 70% (0.64 mm/hr) | 88% | 97% | 754 mm Hg | SE 143° 3.19 (5.14) m/s | 4 |
| 13:00 | Patchy rain possible | 23 °C | 35% (0.1 mm/hr) | 93% | 97% | 753 mm Hg | SSE 163° 3.69 (5.92) m/s | 4 |
| 14:00 | Patchy rain possible | 26 °C | 15% (0.05 mm/hr) | 74% | 64% | 750 mm Hg | SSW 212° 8.5 (9.78) m/s | 6 |
| 15:00 |  Sunny | 27 °C | 8% | 57% | 59% | 750 mm Hg | SW 225° 8.11 (9.31) m/s | 7 |
| 16:00 | Patchy rain possible | 29 °C | 5% | 40% | 54% | 750 mm Hg | WSW 238° 7.69 (8.89) m/s | 6 |
| 17:00 | Sunny | 29 °C | 3% | 23% | 49% | 750 mm Hg | WSW 250° 7.31 (8.42) m/s | 8 |
| 18:00 | Sunny | 28 °C | 3% | 18% | 50% | 751 mm Hg | W 261° 7 (8.81) m/s | 7 |
| 19:00 | Sunny | 27 °C | 2% | 12% | 51% | 752 mm Hg | W 273° 6.81 (9.11) m/s | 7 |
| 20:00 | Sunny | 25 °C | 2% | 7% | 51% | 752 mm Hg | WNW 284° 6.5 (9.5) m/s | 7 |
| 21:00 |  Clear | 23 °C | 3% | 6% | 54% | 753 mm Hg | WNW 282° 5.89 (8.81) m/s | 0 |
| 22:00 | Clear | 22 °C | 3% | 6% | 57% | 754 mm Hg | W 280° 5.19 (8) m/s | 0 |
| 23:00 | Clear | 20 °C | 3% | 5% | 60% | 755 mm Hg | W 278° 4.61 (7.28) m/s | 0 |
Thu, Jun 18, 2026
Boston on the map
Data Sources & Methodology
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