When to plant watermelons in Atlantic City: 5 May – 13 August

In Atlantic City, watermelon: sow for seedlings from 17 March to 16 July; plant into a greenhouse from 14 April to 13 August; plant out into open ground from 5 May to 13 August.

Watermelon in Atlantic City: soil, season and weather

In Atlantic City the soil, not frost, sets the date: the last frost is over around 29 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 5 May, 37 days later.

Last spring frost	29 March
Top 7 cm of soil at 18 °C	5 May, 37 days after the last frost
Into an unheated greenhouse	14 April – 13 August; April outside: 7.9 °C at night, 16.1 °C by day; card 18–35 °C
First autumn frost	22 November, 201 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	3 July – 11 October
Days left for picking	142
Daylight	12:53 on 7 April, 13:59 on 5 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, June, has 10 rainy days

The same dates in Atlantic City hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Atlantic City: care after planting

Planted on 5 May: in the first weeks water every 5 days.

Feeding, by the card’s schedule from that day:

5 May — feed: balanced (NPK)

Pests and diseases of watermelon to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Atlantic City during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 28.8 °C. Months that stay below 18 °C even by day on average: November (13.8 °C). Nights average below 18 °C in May (13 °C), October (13.1 °C) and November (6.2 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	20.1	13	131	12	14:19
June	25.8	18.6	72	10	14:56
July	28.8	22.5	106	12	14:41
August	27.6	21.5	93	11	13:45
September	24.8	18.7	111	11	12:29
October	19.9	13.1	111	9	11:13
November	13.8	6.2	74	8	10:02

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon later than Atlantic City; the closest date is in Annapolis, 3 days later.

City	Distance	Date	Difference
Philadelphia	92 km	14 May – 2 August	9 days later
Dover	97 km	11 May – 17 August	6 days later
Trenton	100 km	21 May – 3 August	16 days later
New York	154 km	21 May – 11 August	16 days later
Allentown	165 km	23 May – 25 July	18 days later
Annapolis	184 km	8 May – 10 August	3 days later

Where to buy watermelon plants and seeds near Atlantic City

Buy plants ready to set out from 5 May to 13 August (from 14 April to 13 August for an unheated greenhouse); seed for raising your own is sown from 17 March to 16 July. Within 15 km of Atlantic City OpenStreetMap lists 3 markets and 1 farm shop (collected 28 October 2026).

Casale al Mare — market
5 km
Bellino's Market — market
15 km
WaWa — market
15 km
Produce Junction — farm shop
13 km

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

Questions