Surfside Beach, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18 °C (low) to 24.9 °C (high). Annual precipitation averages 1201.7 Millimeters. Surfside Beach is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.6 °C | 16.6 °C | 102.11 mm |
| February | 10.5 °C | 18.2 °C | 66.29 mm |
| March | 14 °C | 21.3 °C | 74.93 mm |
| April | 17.6 °C | 24.2 °C | 77.22 mm |
| May | 21.9 °C | 27.7 °C | 95.25 mm |
| June | 24.9 °C | 30.7 °C | 114.55 mm |
| July | 25.9 °C | 31.6 °C | 95 mm |
| August | 25.7 °C | 32.1 °C | 127.25 mm |
| September | 23.6 °C | 30.2 °C | 152.15 mm |
| October | 19.3 °C | 26.7 °C | 101.09 mm |
| November | 14 °C | 21.9 °C | 104.65 mm |
| December | 9.7 °C | 18.1 °C | 91.19 mm |
| Annual | 18 °C | 24.9 °C | 1201.68 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |