Frost dates for 11930Amagansett, NY
The average last spring frost in Amagansett is April 7 and the average first fall frost is November 15, giving a typical growing season of about 222 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 7
- Average first fall frost
- Nov 15
- Growing season
- 222 days
Safer after Apr 20 (1-in-10 risk)
Possible by Nov 2 (1-in-10 risk)
First frost typically in 12 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 9 · Apr 23 · May 6 | Oct 22 · Nov 4 · Nov 17 | 194 days | 100% |
| Frost / freeze (32°F) | Mar 26 · Apr 7 · Apr 20 | Nov 2 · Nov 15 · Nov 29 | 222 days | 100% |
| Hard freeze (28°F) | Mar 11 · Mar 26 · Apr 6 | Nov 14 · Nov 27 · Dec 13 | 247 days | 100% |
Planting calendar for Amagansett
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 7 – May 13 |
| Tomatoes | Transplant outdoors | Apr 23 – Jul 26 |
| Peppers | Start seeds indoors | Mar 7 – Apr 7 |
| Peppers | Transplant outdoors | May 7 – Jun 7 |
| Eggplant | Start seeds indoors | Mar 24 – Apr 22 |
| Eggplant | Transplant outdoors | May 7 – Jun 7 |
| Cucumbers | Sow outdoors | May 7 – Aug 5 |
| Summer squash | Sow outdoors | Apr 23 – Jun 7 |
| Winter squash & pumpkins | Sow outdoors | May 7 – Jun 7 |
| Snap beans | Sow outdoors | Apr 23 – Aug 28 |
| Sweet corn | Sow outdoors | Apr 23 – Jul 26 |
| Watermelon & cantaloupe | Sow outdoors | May 7 – Jun 7 |
| Okra | Sow outdoors | Apr 30 – May 23 |
| Peas | Sow outdoors (spring) | Mar 7 – Apr 22 |
| Potatoes | Plant outdoors (spring) | Mar 7 – May 7 |
| Onions | Start seeds indoors (spring) | Jan 24 – Feb 20 |
| Onions | Transplant outdoors (spring) | Mar 24 – Apr 22 |
| Broccoli | Start seeds indoors (spring) | Feb 17 – Mar 23 |
| Broccoli | Transplant outdoors (spring) | Mar 24 – Apr 22 |
| Broccoli | Start seeds indoors (fall) | Jul 16 – Jul 26 |
| Broccoli | Transplant outdoors (fall) | Aug 15 – Aug 26 |
| Cabbage | Start seeds indoors (spring) | Feb 7 – Mar 7 |
| Cabbage | Transplant outdoors (spring) | Mar 7 – Apr 7 |
| Cabbage | Start seeds indoors (fall) | Jul 6 – Aug 5 |
| Cabbage | Transplant outdoors (fall) | Aug 5 – Sep 5 |
| Leaf lettuce | Sow outdoors (spring) | Mar 7 – May 23 |
| Leaf lettuce | Sow outdoors (fall) | Aug 5 – Sep 21 |
| Spinach | Sow outdoors (spring) | Feb 28 – Apr 13 |
| Spinach | Sow outdoors (fall) | Aug 22 – Sep 26 |
| Radishes | Sow outdoors (spring) | Mar 7 – Apr 27 |
| Radishes | Sow outdoors (fall) | Aug 5 – Oct 6 |
| Kale | Sow outdoors (spring) | Mar 24 – Apr 13 |
| Kale | Sow outdoors (fall) | Jul 29 – Sep 5 |
| Carrots | Sow outdoors (spring) | Apr 7 – May 23 |
| Carrots | Sow outdoors (fall) | Jul 6 – Aug 21 |
| Garlic | Plant outdoors (fall) | Nov 5 – Dec 6 |
Where these dates come from
ZIP code 11930 is matched to the NOAA station Montauk Ap, NY, 17.2 km away, at 7 ft elevation (4 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Montauk Ap, NY (used) | 7 ft | Apr 7 | Nov 15 |
| Bridgehampton, NY | 42 ft | Apr 23 | Oct 24 |
| Orient Pt Sp, NY | 3 ft | Apr 6 | Nov 17 |
| Mattituck, NY | 20 ft | Apr 19 | Nov 1 |
Frost dates near Amagansett
- East Hampton, NY 11937 · last Apr 23, first Oct 24
- Wainscott, NY 11975 · last Apr 23, first Oct 24
- Montauk, NY 11954 · last Apr 7, first Nov 15
- Sagaponack, NY 11962 · last Apr 23, first Oct 24
- Sag Harbor, NY 11963 · last Apr 23, first Oct 24
- Bridgehampton, NY 11932 · last Apr 23, first Oct 24
- Shelter Island, NY 11964 · last Apr 23, first Oct 24
- Water Mill, NY 11976 · last Apr 23, first Oct 24
Frequently asked questions
- When is the last frost in Amagansett, NY?
- For ZIP code 11930, the average last spring frost (32°F) is April 7, based on NOAA 1991-2020 climate normals for the Montauk Ap, NY weather station. There is a 1-in-10 chance of a frost after April 20.
- When is the first frost in Amagansett, NY?
- The average first fall frost (32°F) is November 15. There is a 1-in-10 chance of frost by November 2, so tender plants are at risk from that point on.
- How long is the growing season in 11930?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 222 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.