The official National Weather Service forecast for Caswell Beach — 33.896°N, 78.0511°W, 20.6 miles from I-140. Forecasts here are written by NWS ILM, this county’s forecast office.
| Brunswick County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 57 | 61 | 67 | 74 | 81 | 87 | 89 | 88 | 84 | 76 | 67 | 60 | 74 |
| Avg low °F | 35 | 38 | 43 | 51 | 60 | 68 | 72 | 71 | 65 | 54 | 43 | 38 | 53 |
| Precip in | 3.1 | 3.4 | 3.5 | 3.4 | 4.0 | 4.9 | 6.6 | 7.1 | 7.3 | 3.9 | 3.3 | 3.7 | 54.2 |
1996–2025 normals for Brunswick County — the climate division Caswell Beach sits in. All-time county record high 102.9°F (1952-06-27); record low 1.7°F (1989-12-25). Source: NOAA / National Weather Service.