How Often Should You Reapply Sunscreen?

Sunscreen is your skin’s best defense against harmful UV rays, but applying it once in the morning isn’t enough. To truly protect your skin from sunburn, premature aging, and even skin cancer, reapplication is key.

So, how often should you reapply sunscreen? The answer depends on several factors including your activity level, skin type, and the kind of sunscreen you’re using. Let’s dive into the expert-recommended sunscreen reapplication rules for ultimate skin safety in 2025.

The 2-Hour Rule: A General Guideline

Dermatologists universally recommend reapplying sunscreen every two hours when you’re exposed to the sun. This rule holds true regardless of your SPF level, skin tone, or product type.

Why? Because sunscreen—especially chemical-based SPF—breaks down over time due to:

• Sunlight exposure

• Sweat

• Natural oils from your skin

• Rubbing or contact (like towels or clothing)

Situations When You Should Reapply Sooner

There are certain conditions where reapplying more frequently than every two hours is necessary:

1. After Swimming or Sweating

Even if your sunscreen is labeled “water-resistant,” its protection diminishes once you’re wet. Reapply:

• Immediately after swimming or toweling off

• After 40 to 80 minutes of swimming or sweating, depending on the label

2. Outdoor Workouts or Sports

Active movement can cause sweat and friction, both of which wear down your sunscreen. Keep a small bottle on hand and reapply every 60–90 minutes during heavy activity.

3. Towel Drying or Wiping Skin

Wiping your face or body can remove sunscreen—especially on areas like the nose, shoulders, and ears. Reapply after using a towel or napkin.

Sunscreen Reapplication by Skin Type

Oily Skin:

Oils can break down sunscreen faster. Use mattifying sunscreen powders or setting sprays for midday reapplication without disrupting makeup.

Dry Skin:

Look for hydrating SPF moisturizers. Reapply gently to avoid further irritation or dryness.

Sensitive or Acne-Prone Skin:

Mineral sunscreens with zinc oxide are ideal. Opt for non-comedogenic formulas and reapply carefully to avoid clogging pores.

Types of Sunscreen and How Long They Last

Tip: Always apply to clean, dry skin for best results.

Sunscreen Reapplication Over Makeup

Yes, it’s possible—and necessary—to reapply sunscreen over makeup, especially if you’re out and about during the day.

Best Products for This:

• SPF setting sprays

• Powder sunscreens

• Cushion compacts with SPF

These options allow you to refresh your sun protection without messing up your makeup.

Don’t Forget These Easy-to-Miss Spots

Even if you’re reapplying regularly, some spots get overlooked. Always remember to reapply to:

• Ears

• Back of the neck

• Tops of feet

• Hairline

• Scalp (if exposed)

• Lips (use an SPF lip balm)

What Happens If You Don’t Reapply?

Neglecting to reapply sunscreen can lead to:

• Sunburn

• Skin inflammation

• Hyperpigmentation

• Premature aging

• Increased skin cancer risk

Think of sunscreen like a temporary shield—it wears off and needs reactivating. No matter how high your SPF is, it won’t protect you all day without touch-ups.

Pro Tips to Make Reapplying Easier

• Set phone reminders every 2 hours when you’re outdoors.

• Keep travel-size SPF in your bag, car, or office drawer.

• Use a sunscreen stick or compact for easy reapplication on the go.

• Choose multi-use products like moisturizers or foundations with SPF to make layering seamless.

Final Thoughts

Sunscreen isn’t just for sunny beach days—it’s a daily essential. And applying it once isn’t enough. Reapplying every two hours (or sooner in certain situations) is the key to real, lasting protection.

Invest in quality sunscreen, keep it close, and make reapplication a habit. Your skin will thank you for years to come.