Frost dates for 11733East Setauket, NY
The average last spring frost in East Setauket is April 15 and the average first fall frost is November 10, giving a typical growing season of about 208 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 15
- Average first fall frost
- Nov 10
- Growing season
- 208 days
Safer after May 4 (1-in-10 risk)
Possible by Oct 27 (1-in-10 risk)
First frost typically in 7 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 15 · Apr 30 · May 15 | Oct 14 · Oct 29 · Nov 10 | 180 days | 100% |
| Frost / freeze (32°F) | Apr 1 · Apr 15 · May 4 | Oct 27 · Nov 10 · Nov 24 | 208 days | 100% |
| Hard freeze (28°F) | Mar 14 · Mar 31 · Apr 19 | Nov 9 · Nov 21 · Dec 5 | 235 days | 100% |
Planting calendar for East Setauket
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 15 – May 21 |
| Tomatoes | Transplant outdoors | May 1 – Jul 21 |
| Peppers | Start seeds indoors | Mar 15 – Apr 15 |
| Peppers | Transplant outdoors | May 15 – Jun 15 |
| Eggplant | Start seeds indoors | Apr 1 – Apr 30 |
| Eggplant | Transplant outdoors | May 15 – Jun 15 |
| Cucumbers | Sow outdoors | May 15 – Jul 31 |
| Summer squash | Sow outdoors | May 1 – Jun 15 |
| Winter squash & pumpkins | Sow outdoors | May 15 – Jun 15 |
| Snap beans | Sow outdoors | May 1 – Aug 23 |
| Sweet corn | Sow outdoors | May 1 – Jul 21 |
| Watermelon & cantaloupe | Sow outdoors | May 15 – Jun 15 |
| Okra | Sow outdoors | May 8 – May 31 |
| Peas | Sow outdoors (spring) | Mar 15 – Apr 30 |
| Potatoes | Plant outdoors (spring) | Mar 15 – May 15 |
| Onions | Start seeds indoors (spring) | Feb 1 – Feb 28 |
| Onions | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (spring) | Feb 25 – Mar 31 |
| Broccoli | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (fall) | Jul 11 – Jul 21 |
| Broccoli | Transplant outdoors (fall) | Aug 10 – Aug 21 |
| Cabbage | Start seeds indoors (spring) | Feb 15 – Mar 15 |
| Cabbage | Transplant outdoors (spring) | Mar 15 – Apr 15 |
| Cabbage | Start seeds indoors (fall) | Jul 1 – Jul 31 |
| Cabbage | Transplant outdoors (fall) | Jul 31 – Aug 31 |
| Leaf lettuce | Sow outdoors (spring) | Mar 15 – May 31 |
| Leaf lettuce | Sow outdoors (fall) | Jul 31 – Sep 16 |
| Spinach | Sow outdoors (spring) | Mar 8 – Apr 21 |
| Spinach | Sow outdoors (fall) | Aug 17 – Sep 21 |
| Radishes | Sow outdoors (spring) | Mar 15 – May 5 |
| Radishes | Sow outdoors (fall) | Jul 31 – Oct 1 |
| Kale | Sow outdoors (spring) | Apr 1 – Apr 21 |
| Kale | Sow outdoors (fall) | Jul 24 – Aug 31 |
| Carrots | Sow outdoors (spring) | Apr 15 – May 31 |
| Carrots | Sow outdoors (fall) | Jul 1 – Aug 16 |
| Garlic | Plant outdoors (fall) | Oct 31 – Dec 1 |
Where these dates come from
ZIP code 11733 is matched to the NOAA station Setauket Strong, NY, 1.9 km away, at 40 ft elevation (19 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Setauket Strong, NY (used) | 40 ft | Apr 15 | Nov 10 |
| Mt Sinai, NY | 50 ft | Apr 4 | Nov 7 |
| Islip Li Macarthur Ap, NY | 84 ft | Apr 10 | Nov 2 |
| Upton Coop - Nwsfo New York, NY | 80 ft | Apr 21 | Oct 24 |
Frost dates near East Setauket
- Stony Brook, NY 11794 · last Apr 10, first Nov 2
- Port Jefferson, NY 11777 · last Apr 10, first Nov 2
- Port Jefferson Station, NY 11776 · last Apr 10, first Nov 2
- Saint James, NY 11780 · last Apr 10, first Nov 2
- Centereach, NY 11720 · last Apr 10, first Nov 2
- Mount Sinai, NY 11766 · last Apr 10, first Nov 2
- Lake Grove, NY 11755 · last Apr 10, first Nov 2
- Selden, NY 11784 · last Apr 10, first Nov 2
Frequently asked questions
- When is the last frost in East Setauket, NY?
- For ZIP code 11733, the average last spring frost (32°F) is April 15, based on NOAA 1991-2020 climate normals for the Setauket Strong, NY weather station. There is a 1-in-10 chance of a frost after May 4.
- When is the first frost in East Setauket, NY?
- The average first fall frost (32°F) is November 10. There is a 1-in-10 chance of frost by October 27, so tender plants are at risk from that point on.
- How long is the growing season in 11733?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 208 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.