Katama County Beach Weather Forecast
- 56
- 78
Decreasing Clouds
- 69
- 80
Chance Rain Showers
- 66
- 77
Chance Thunderstorms
- 64
- 74
Mostly Sunny
- 65
- 72
Mostly Sunny
- 67
- 73
Partly Sunny
- 70
- 76
Partly Sunny
Today 18 Jul Dukes
Partly sunny. Near steady temperature in the upper 70s. North Winds 5 to 10 Mph.
Tonight 18 Jul Dukes
Partly cloudy this Evening, then clearing. Cooler with Lows in the mid 50s. South Winds 5 to 10 Mph.
Katama County Beach Temperature Statistics
July Temperature
Marthas Vineyard Airport (6.8 miles)
Lowest 5 July, 2025
47.6 °FAverage July
71.3 °FHighest 8 July, 2025
85.6 °F
Climate (2020–Present)
Marthas Vineyard Airport (6.8 miles)
Average Low 2020–2025
44.8 °FAverage 2020–2025
53.3 °FAverage High 2020–2025
61.1 °F