Bay
Dorchester Bay
Massachusetts · United States · Pacific Ocean
42.3251, -71.0078 · South Boston, 4 km
- 19°Sea · August
- 28°High · July
- 8.3 hSunshine · July
Your month at the beach
Dorchester Bay in January
- 0°CAir, daytime high-8°C at night
- 5°CSea temperature
- 4.2 hSunshine a day
- 10 daysRainy days in the month80 mm in total
- 12 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in February
- 2°CAir, daytime high-7°C at night
- 3°CSea temperature
- 5.0 hSunshine a day
- 9 daysRainy days in the month86 mm in total
- 12 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in March
- 6°CAir, daytime high-3°C at night
- 3°CSea temperature
- 5.7 hSunshine a day
- 11 daysRainy days in the month110 mm in total
- 12 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in April
- 13°CAir, daytime high2°C at night
- 6°CSea temperature
- 6.5 hSunshine a day
- 11 daysRainy days in the month106 mm in total
- 10 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in May
- 19°CAir, daytime high8°C at night
- 10°CSea temperature
- 6.7 hSunshine a day
- 12 daysRainy days in the month95 mm in total
- 8 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in June
- 24°CAir, daytime high14°C at night
- 15°CSea temperature
- 7.4 hSunshine a day
- 13 daysRainy days in the month113 mm in total
- 7 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in July
- 28°CAir, daytime high17°C at night
- 18°CSea temperature
- 8.3 hSunshine a day
- 12 daysRainy days in the month94 mm in total
- 7 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in August
- 27°CAir, daytime high17°C at night
- 19°CSea temperature
- 7.8 hSunshine a day
- 12 daysRainy days in the month93 mm in total
- 7 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in September
- 24°CAir, daytime high13°C at night
- 17°CSea temperature
- 6.8 hSunshine a day
- 10 daysRainy days in the month92 mm in total
- 7 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in October
- 16°CAir, daytime high7°C at night
- 14°CSea temperature
- 4.7 hSunshine a day
- 10 daysRainy days in the month123 mm in total
- 9 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in November
- 10°CAir, daytime high1°C at night
- 10°CSea temperature
- 4.2 hSunshine a day
- 10 daysRainy days in the month98 mm in total
- 10 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
Dorchester Bay in December
- 4°CAir, daytime high-4°C at night
- 8°CSea temperature
- 3.4 hSunshine a day
- 11 daysRainy days in the month116 mm in total
- 11 km/hAverage wind
Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.
The beach itself
- 24Places to stay within 5 kmHotels, guest houses, apartments and campsites · OpenStreetMap Places to stay near Dorchester Bay ↗
- 4 kmAirport: Boston Logan International Airport (BOS)In a straight line; by road it is further Car hire at Boston Logan International Airport (BOS) ↗
No reliable information yet on: bathing water quality, wheelchair access, lifeguards.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
January from 2020 to 2025
In January 2025 the sea averaged 5.2 °C — about the same as the 1991–2020 average.
1991–2020 average: 4.9 °C
1991–2020 average: 0.5 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
February from 2020 to 2025
In February 2025 the sea averaged 3.3 °C — about the same as the 1991–2020 average.
1991–2020 average: 3.3 °C
1991–2020 average: 1.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
March from 2020 to 2025
In March 2025 the sea averaged 3.9 °C — 0.4 °C above the 1991–2020 average.
1991–2020 average: 3.5 °C
1991–2020 average: 5.8 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
April from 2020 to 2025
In April 2025 the sea averaged 6.1 °C — 0.3 °C above the 1991–2020 average.
1991–2020 average: 5.8 °C
1991–2020 average: 12.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
May from 2020 to 2025
In May 2025 the sea averaged 10.2 °C — about the same as the 1991–2020 average.
1991–2020 average: 10.1 °C
1991–2020 average: 18.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
June from 2020 to 2025
In June 2025 the sea averaged 14.6 °C — about the same as the 1991–2020 average.
1991–2020 average: 14.7 °C
1991–2020 average: 23.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
July from 2020 to 2025
In July 2025 the sea averaged 18.7 °C — 0.5 °C above the 1991–2020 average.
1991–2020 average: 18.2 °C
1991–2020 average: 27.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
August from 2020 to 2025
In August 2025 the sea averaged 18.9 °C — about the same as the 1991–2020 average.
1991–2020 average: 18.8 °C
1991–2020 average: 27.4 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
September from 2020 to 2025
In September 2025 the sea averaged 17.7 °C — 0.7 °C above the 1991–2020 average.
1991–2020 average: 17.0 °C
1991–2020 average: 23.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
October from 2020 to 2025
In October 2025 the sea averaged 15.2 °C — 1.7 °C above the 1991–2020 average.
1991–2020 average: 13.5 °C
1991–2020 average: 16.3 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
November from 2020 to 2025
In November 2025 the sea averaged 10.1 °C — about the same as the 1991–2020 average.
1991–2020 average: 10.2 °C
1991–2020 average: 9.6 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
December from 2020 to 2025
In December 2025 the sea averaged 7.2 °C — about the same as the 1991–2020 average.
1991–2020 average: 7.5 °C
1991–2020 average: 3.7 °C
Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.
When to go
1991–2020 averagesThe year at a glance
- Jan5°4 h80 mm
- Feb3°5 h86 mm
- Mar3°6 h110 mm
- Apr6°6 h106 mm
- May10°7 h95 mm
- Jun15°7 h113 mm
- Jul18°8 h94 mm
- Aug19°8 h93 mm
- Sep17°7 h92 mm
- Oct14°5 h123 mm
- Nov10°4 h98 mm
- Dec8°3 h116 mm
Each card is a month. The colour is the sea temperature, on the same scale as the map; in bold, the two best months for each.
Sea temperature
1991–2020 averagesClimate through the year
1991–2020 averagesRain
Sunshine
Sunshine hours are estimated from measured solar radiation, not observed directly.
Month by month
1991–2020 averagesEvery month at Dorchester Bay: air, sea, rain and sunshine. Averages for 1991–2020.
| Month | High°C | Low°C | Sea°C | Rainmm | Rainy daysdays | Sunshineh/day | Windkm/h |
|---|---|---|---|---|---|---|---|
| January | 0 | -8 | 5 | 80 | 10 | 4.2 | 12 |
| February | 2 | -7 | 3 | 86 | 9 | 5.0 | 12 |
| March | 6 | -3 | 3 | 110 | 11 | 5.7 | 12 |
| April | 13 | 2 | 6 | 106 | 11 | 6.5 | 10 |
| May | 19 | 8 | 10 | 95 | 12 | 6.7 | 8 |
| June | 24 | 14 | 15 | 113 | 13 | 7.4 | 7 |
| July | 28 | 17 | 18 | 94 | 12 | 8.3 | 7 |
| Augustwarmest sea | 27 | 17 | 19 | 93 | 12 | 7.8 | 7 |
| September | 24 | 13 | 17 | 92 | 10 | 6.8 | 7 |
| October | 16 | 7 | 14 | 123 | 10 | 4.7 | 9 |
| November | 10 | 1 | 10 | 98 | 10 | 4.2 | 10 |
| December | 4 | -4 | 8 | 116 | 11 | 3.4 | 11 |
Swipe sideways to see the other columns.
Photos
Photos shared by their authors on Wikimedia Commons, with its colours adjusted.
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Plan your trip
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Nearby destinations
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Averages are for 1991–2020; the recent years (2020–2025) are what actually happened. Neither is today's weather.
| What | Where it comes from | Nearest measurement |
|---|---|---|
| Air, rain and sunshine | NASA POWER | 28 km away |
| Sea temperature | NOAA OISST v2.1, 1991–2020 | 12 km away |
| 2020–2025, month by month | NASA POWER · NOAA OISST v2.1 | 28 km away |
| Lifeguards and places to stay | OpenStreetMap | within 1–5 km |
| Nearest airport | OurAirports | straight-line distance |
| Image at the top | Sentinel-2 cloudless (EOX) | at this spot |
More about this place: Wikipedia See every data source →