Surfside Beach, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 64.4 °F (low) to 76.9 °F (high). Annual precipitation averages 47.3 Inches. Surfside Beach is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 47.4 °F | 61.9 °F | 4.02 in. |
| February | 50.9 °F | 64.8 °F | 2.61 in. |
| March | 57.2 °F | 70.3 °F | 2.95 in. |
| April | 63.6 °F | 75.5 °F | 3.04 in. |
| May | 71.5 °F | 81.8 °F | 3.75 in. |
| June | 76.9 °F | 87.2 °F | 4.51 in. |
| July | 78.6 °F | 88.9 °F | 3.74 in. |
| August | 78.3 °F | 89.7 °F | 5.01 in. |
| September | 74.5 °F | 86.4 °F | 5.99 in. |
| October | 66.7 °F | 80.0 °F | 3.98 in. |
| November | 57.2 °F | 71.4 °F | 4.12 in. |
| December | 49.4 °F | 64.5 °F | 3.59 in. |
| Annual | 64.4 °F | 76.9 °F | 47.31 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |