July on the East Coast can be magic, with clean lines at Wainui and more consistent swell at the town beaches. It can also be icy on your first duck dive. Choosing between a 3/2 and 4/3 is the difference between one more set and an early shower.
This guide breaks down thickness ratings, winter water temps for Gisborne and the wider East Coast, how construction affects warmth and flex, when to add a hood, and simple fit and care tips. You will finish with a clear answer on 3/2 vs 4/3 for your winter and the add-ons that extend your season.
What 3/2, 3.2 and 4/3 actually mean
Wetsuit thickness is measured in millimetres. A two-number rating shows torso thickness first, limb thickness second.
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3/2 or 3.2: 3 mm in the chest and back for core warmth, 2 mm in the shoulders, arms and legs for flex.
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4/3: 4 mm in the torso, 3 mm in the limbs for more warmth, some loss of mobility.
Panels vary across brands, but the idea is consistent, thicker where you need heat, thinner where you need movement. You will also see construction notes that matter just as much as thickness:
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Seams: Flatlock (warm-water, breathable) vs GBS, which stands for glued and blindstitched, designed to reduce water entry. Fully taped or liquid-sealed seams add another layer against flushing.
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Linings: Fleece or thermal linings trap air and dry faster, boosting warmth without adding millimetres.
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Entry systems: Chest zips typically flush less than back zips. Zipperless entries can feel extra flexible but rely on a snug seal.
East Coast winter temps and what to wear
Typical mid-winter sea surface temps around Gisborne and Tairāwhiti sit near 13 to 15 C in July, with windchill on the beach and wind-driven surface cooling after fronts. Nearby Hawke’s Bay and Bay of Plenty track a similar band year to year.
A simple mapping that works for most surfers and swimmers:
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16 to 18 C shoulder season: 3/2 is fine for active surfs, add booties if you feel the cold.
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14 to 16 C mid-winter Gizzy: 4/3 is the safer bet for longer sessions. A toasty 3/2 with premium thermal lining and GBS plus taping can work for short, high-output surfs if you do not mind a brisk first paddle.
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12 to 14 C cold snaps and dawnies, or if you feel the cold: 4/3 plus 3 mm booties, and a hood or hooded suit for early offshore mornings.
If you are unsure, choose for the coldest, windiest part of your routine. You can always vent heat by flushing your neck briefly, but you cannot invent extra millimetres mid-session.
For a look at current conditions, check the free Gisborne surf cam and our local guide to the surf forecast in Gisborne on the Blitz site.
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See the Wainui Beach cam and report: https://blitzsurf.co.nz/pages/wainui-beach
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Read the Gisborne surf forecast guide: https://blitzsurf.co.nz/blogs/guides/gisborne-surf-guide
Warmth vs flexibility explained
Warmth comes from a tight seal, low flushing and trapped air in neoprene and lining. Flex comes from thinner panels, stretch fabrics and fewer stiffen points at seams. Here is how the parts work together:
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Neoprene thickness: Each extra millimetre is noticeable. A 4/3 is typically one warmth step above a 3/2 but will feel stiffer through the shoulders.
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Seams: GBS seams reduce holes through the suit. Internal taping or external seam welds improve warmth again and durability, especially along the lower back and crotch where flushing ruins a session.
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Thermal linings: Modern linings add warmth without much weight. They also speed drying, which means tomorrow’s dawn paddle starts warmer.
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Pattern and paneling: Better suits place flex panels at the paddle zones so thicker suits still move well. Less panels also means more flex and less areas for leaking
Do thicker wetsuits restrict movement? Usually yes, a little. Premium stretch neoprene, smart panelling and break-in time can offset this. If paddling power is your edge, a very warm 3/2 with taped seams and a hood might feel better than a budget 4/3.
3/2 vs 4/3 for Tairāwhiti in July
For most surfers in Gisborne, a 4/3 is the dependable winter daily driver. If you run warm, keep surfs shorter, or choose a high-spec 3/2 with GBS, taped seams and a plush lining, a 3/2 can still work. Swimmers and SUP paddlers who spend more time static will appreciate the 4/3 plus booties.
If you want to compare options, browse our men’s, women’s and kids’ suits online. We stock 3/2 and 4/3 steamers, plus boots, gloves and hoods, and we are happy to recommend sizes and construction for your routine.
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Explore men’s wetsuits: https://blitzsurf.co.nz/collections/mens-wetsuits
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Shop all wetsuits in NZ: https://blitzsurf.co.nz/collections/wetsuits-nz
When a hood, booties and gloves help
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Hood or hooded suit: A hood cuts brain-freeze on duck dives and blocks wind at dawn. Use one as soon as ear aches or ice-cream-headache hits, or any time the wind is offshore and cold. Built-in hoods also reduce neck flushing. Buy wetsuit hoods
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Booties: 3 mm is a sweet spot for board feel at 12 to 15 C. Go 5 mm if you have poor circulation or are in the South Island. Fit them snug so water does not slosh. Buy wetsuit boots
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Gloves: 1.5 to 3 mm for most, 5 mm for long holds on cold mornings in the South Island, not usually necessary around here unless you are diving. Buy wetsuit gloves
You can add a separate hood to any steamer, or choose a wetsuit with hood built in for fewer gaps.
Fit and sizing tips for men, women and kids
A good fit is warm before you even talk thickness.
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Snug but not strangling: No big gaps at the lower back, underarms or behind knees. Light pressure equals insulation, but you should breathe and paddle freely.
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Move test: Air swim in the shop or at home. Can you reach overhead and pretend to duck dive without the suit tugging hard at your shoulders?
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Length and cuffs: Ankles and wrists should sit flat, not flared. Neck seal should lie smooth.
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Between sizes: Prioritise torso and shoulder fit over a tiny wrinkle at the calf. Women’s and kids’ cuts vary by brand, so use height and weight charts and ask for advice.
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Flushing check: If you can scoop a handful of suit off your lower back, it is too big.
What to wear under a wetsuit
Keep it simple. Wear a swimsuit, bikini, or lined trunks. A rash vest adds comfort and reduces neck rub. Avoid cotton, baggy shorts or anything with hard seams, zips or pockets that can chafe or trap water. Lots of males go full commando under their wetsuit. Rinse gear after use for comfort and hygiene.
If you prefer extra core warmth for short swims, a thin neoprene vest under a steamer works well and does not bunch at the shoulders. See our rash vest and wetsuit top options for layering ideas.
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Check men’s rash vests and tops: https://blitzsurf.co.nz/collections/mens-lycra
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Browse men’s wetsuit tops and vests: https://blitzsurf.co.nz/collections/mens-wetsuit-vests
At-home care that extends suit life
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Rinse in cool, fresh water after every session.
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Use a wetsuit-safe detergent occasionally to remove salt and smell.
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Dry in the shade, inside out first, then turn right side out. Avoid direct sun and heaters.
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Store flat or on a wide hanger to protect shoulders and prevent creases.
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DIY checks: Look for seam nicks, loose tape at stress points, and fraying at cuffs. Small cuts can often be patched with wetsuit cement. Always follow manufacturer instructions and consider professional repair for major damage.
We stock wetsuit-safe detergents and can advise on simple at-home checks so you get more seasons from your suit.
Quick answers to common questions
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What temperature is a 3/2 wetsuit for? About 16 to 20 C for most people, or 14 to 16 C if the suit is high-spec with GBS, taping and a warm lining and your sessions are short.
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What is a 3x2 wetsuit? Another way of writing 3/2. It means 3 mm in the torso and 2 mm in the limbs.
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Should I get a 3/2 or 4/3 wetsuit? For Gisborne in July, most surfers will be happier in a 4/3. Warm-blooded riders or short, high-output sessions can suit a premium 3/2.
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What thickness wetsuit do I need in NZ? It depends on region and season. North Island winter surf is often 4/3. Shoulder seasons suit 3/2. South Island winters can require thicker suits and accessories.
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Is a 3 mm wetsuit ok for winter? It can be, with premium construction, for short surfs and warmer days. For consistent comfort in Gizzy mid-winter, a 4/3 is usually better.
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What is the best thickness for a wetsuit? The best is the one that keeps you warm enough without killing your paddle. In July on the East Coast, that is typically a 4/3.
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Do thicker wetsuits restrict movement? Yes, typically a bit. High-stretch neoprene and smart panelling reduce the difference.
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How should a wetsuit fit men? Snug everywhere with no big gaps, full shoulder reach, smooth seals at neck, wrists and ankles. If in between sizes, choose the size that locks the core and shoulders.
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What should a man wear under a wetsuit? Commando, speedos, lined trunks or a light pair of shorts, plus a rash vest if you like. Avoid bulky shorts and metal hardware.
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How much is a decent wetsuit? Prices vary by brand and features. Expect to pay more for GBS seams, taping and thermal linings. Check our current range online for options across budgets. Expect to pay anywhere between around $330-800 for a winter 4/3 wetsuit in NZ depending on what features you are after. Most wetsuit sales are in the $450-580 range
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Are hooded wetsuits better? They are warmer and reduce flushing, especially on windy dawns or long duck-dive sessions.
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When to wear a wetsuit hood? When water is below about 14 to 15 C for you, on offshore winter mornings, or any time you feel ice-cream-headache or ear ache starting.
Wrap up
For Tairāwhiti in July, a 4/3 plus booties is the reliable choice. A high-spec 3/2 can still work if you run warm and keep it short. Focus on fit, GBS seams with taping, and a quality lining. Add a hood when the wind bites, and keep your suit rinsed, shaded and well hung so it lasts.
Want personalised sizing or construction advice for men, women or kids? The Blitz Surf Shop team can recommend the right setup and point you to the gear that matches your routine. Shop online with NZ-wide shipping or visit us in Gisborne for friendly guidance.
