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Mayfair Boat Yard & Marina

About

Mayfair Boat Yard & Marina is a marina in South Dennis, Massachusetts. It is located on Kelly's Bay, north of the Mid-Cape Highway Bridge, with access to Bass River and Nantucket Sound. The marina has been family owned and operated since 1964.

Gallery

Operator details

Vessels
Powerboat

Boater reviews

4.8on Google, 35 reviews
Read the reviews on Google Maps

Rating from Google.

Around here

Around Mayfair Boat Yard & Marina

Old Chatham Road Campground1.6 miSun Retreats Dennis Port3.6 mi1 mi

Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US

Typical flow by month

1966 to 2026

The water at Mayfair Boat Yard & Marina typically runs highest in May, at a median 14 cfs, and lowest in October, at 4.4 cfs. The highest flow on record for any single day is 51 cfs, in 1983.

Show the numbers
Typical flow by month at Herring River at North Harwich, MA, in cfs
MonthTypical (cfs)Usual range (cfs)
January8.04.6 to 13
February116.8 to 17
March138.5 to 17
April149.8 to 17
May149.9 to 17
June128.3 to 15
July8.05.3 to 12
August5.23.3 to 8.8
September4.52.2 to 7.8
October4.42.4 to 7.2
November5.43.3 to 8.5
December6.73.7 to 11

Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 41 years of record. Statistics published by the US Geological Survey for Herring River at North Harwich, MA (site 01105880). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

Current conditions

Today · Fri

45Maybe/ 100

3.5 ft waves · 92% chance of rain

RainWaves 3.8 ft65°FRain 92%Wind 19 kt, gusts 28

Waves

3.5 ft @ 6s

Wind

13 kt

Gusts 28 kt

Water

57°F

Air

61°F

Streamflow

1.8 cfs

Much below normal (7th)

Water level

1.85 ft

Air quality

36 Good

Truro monitor, 33 km

Tides

Rising

High 2.8 ft at 11:01 PM

Predicted at South Yarmouth, Bass River, 4 km away.

Get a 2027 tide calendar for this station

Forecast from Open-Meteo global models (NOAA & ECMWF). Air quality: Massachusetts Dept. of Environmental Protection via EPA AirNow. Preliminary data, not verified. Tide predictions: NOAA CO-OPS, feet above mean lower low water. See full conditions →