ombak waves
Nusa Penida sea and weather data: waves and sea temperature
The sea and weather rows of the register behind this guide to Nusa Penida in Bali, Indonesia: the wave height categories BMKG, Indonesia's weather and sea forecast agency, uses in its warnings, sea temperature measured at Crystal Bay and published in a peer-reviewed study, the wet season as the advisories describe it, and the weather terms boat operators publish. Each row names the body, links to its page and carries the date it was read. All rows download from the Nusa Penida data page.
31 rows, read 13 November 2026. Every row of every topic: JSON or CSV, licence CC BY 4.0.
Type a word, a body or a row id to narrow the rows on this page.
Sea and weather
BMKG wave categories, measured sea temperature at Crystal Bay, wet season dates and weather cancellation terms. Read at the source on 13 November 2026; select a row id for its own address.
| Row | Claim | Value | Issuing body | Read |
|---|---|---|---|---|
| BRW-ADV-023 | Smartraveller states Indonesia's wet season usually runs from October to April | October to April months | Smartraveller (Australian Government) | |
| BRW-ADV-040 | The US State Department's 2026 travel guidance states Indonesia's rainy season runs from November to March or April and the dry season from June to October | Nov to Mar/Apr rainy; Jun to Oct dry months | US Department of State | |
| SEA-BOAT-076 | Several Sanur operators reserve the right to cancel without liability on direction of the Indonesian Government and/or the Harbour Master (Arjuna, El Rey, Wijaya Buyuk, Semaya One, Golden Queen, D'Stars) | Harbour Master direction cancellation ground | Operators' terms pages | |
| SEA-TEMP-001 | Tito and Susilo (2017) measured monthly mean sea temperature at Crystal Bay (logger at 8 m, June 2011 to December 2014) ranging | 24.6 to 27.8 °C | Tito and Susilo | |
| SEA-TEMP-002 | Tito and Susilo (2017) give the overall mean sea temperature at Crystal Bay (8 m, 2011-2014) as | 26.2 °C | Tito and Susilo | |
| SEA-TEMP-003 | Tito and Susilo (2017) found the warmest month at Crystal Bay (8 m, 2011-2014) was | January month | Tito and Susilo | |
| SEA-TEMP-004 | Tito and Susilo (2017) found the coolest month at Crystal Bay (8 m, 2011-2014) was | September month | Tito and Susilo | |
| SEA-TEMP-005 | Tito and Susilo (2017) found the coolest water at Crystal Bay, about 24 °C, with daily swings over 1.75 °C, in | September to November months | Tito and Susilo | |
| SEA-TEMP-006 | Tito and Susilo (2017) found Crystal Bay water below 26 °C from boreal summer through | September month | Tito and Susilo | |
| SEA-WAVE-001 | BMKG's high-wave warnings cover four categories; 'Gelombang Sedang' (moderate) is a significant wave height of | 1.25 to 2.5 m | BMKG | |
| SEA-WAVE-002 | BMKG category 'Gelombang Tinggi' (high) is a significant wave height of | 2.5 to 4 m | BMKG | |
| SEA-WAVE-003 | BMKG category 'Gelombang Sangat Tinggi' (very high) is a significant wave height of | 4 to 6 m | BMKG | |
| SEA-WAVE-004 | BMKG category 'Gelombang Ekstrem' (extreme) is a significant wave height of more than | 6 m | BMKG | |
| SEA-WAVE-005 | BMKG's Shipping Bulletin uses the Douglas Sea Scale, where 'Slight' sea is a wave height of | 0.5 to 1.25 m | BMKG | |
| SEA-WAVE-006 | BMKG's Douglas Sea Scale gives 'Moderate' sea as a wave height of | 1.25 to 2.5 m | BMKG | |
| SEA-WAVE-007 | BMKG's Douglas Sea Scale gives 'Rough' sea as a wave height of | 2.5 to 4 m | BMKG | |
| SEA-WAVE-008 | BMKG warns that maximum waves may reach the significant wave height multiplied by up to | 2 times | BMKG | |
| SEA-WAVE-009 | BMKG warns that wind gusts can be stronger than the stated average wind by up to | 40 percent | BMKG | |
| SEA-WAVE-010 | BMKG forecasts the Badung Strait (Sanur to Nusa Penida and Nusa Lembongan crossings) as sea area | P.P.02 Selat Badung area code | BMKG | |
| SEA-WAVE-011 | BMKG forecasts the southern Lombok Strait (east of Nusa Penida, Padang Bai side) as sea area | P.P.06 Selat Lombok Bagian Selatan area code | BMKG | |
| SEA-WAVE-012 | BMKG states the Badung Strait forecast is issued by | Balai Besar MKG Wilayah III (Jl. Raya Tuban, Badung) issuer | BMKG | |
| SEA-WAVE-013 | BMKG publishes Badung Strait forecasts ahead for a period of | 3 days | BMKG | |
| SEA-WAVE-014 | BMKG is reported to rate sailing as high-risk for small fishing boats when wind exceeds 15 knots and waves exceed | 1.25 m | BMKG | |
| SEA-WAVE-015 | BMKG is reported to rate sailing as high-risk for barges when wind exceeds 16 knots and waves exceed | 1.5 m | BMKG | |
| SEA-WAVE-016 | BMKG is reported to rate sailing as high-risk for ferries when wind exceeds 21 knots and waves exceed | 2.5 m | BMKG | |
| SEA-WAVE-017 | BMKG is reported to rate sailing as high-risk for large ships (cargo, cruise) when wind exceeds 27 knots and waves exceed | 4 m | BMKG | |
| SEA-WAVE-018 | Under Ministry of Transport rule PM 28/2022 the harbour master (Syahbandar) may refuse sailing approval for weather that endangers the vessel, judged by vessel | size and/or type criterion | Peraturan Menteri Perhubungan PM 28 Tahun 2022 on Sailing Approval | |
| SEA-WAVE-019 | PM 28/2022 lets the harbour master postpone a vessel's departure on the basis of | weather criterion | Peraturan Menteri Perhubungan PM 28 Tahun 2022 on Sailing Approval | |
| SEA-WAVE-020 | KSOP Benoa is reported (June 2025) to say it can withhold sailing approval for Sanur fast boats in bad weather until waves ease, using | BMKG forecasts basis | ANTARA News Bali | |
| SEA-WAVE-022 | The fast boat Bali Dolphin Cruise 2, sailing from Nusa Penida, capsized in the Sanur harbour entrance channel; KSOP Benoa is reported to cite BMKG wave heights at the time of | 2 to 4 m | ANTARA News Bali | |
| SEA-WAVE-024 | Semaya One states weather cancellations of its crossings happen mainly in | January to March months | Semaya One |
sumber sources
Reading the sea rows
The BMKG rows are definitions: they say what wave height each warning category stands for, not what the sea will do on a given day. For the day itself, BMKG publishes its own maritime forecasts and warnings, and operators decide on sailings from them.
The sea temperature rows come from one logger series at Crystal Bay, published with its depth and years in the claim. They describe monthly means over those years, not a forecast and not the surface temperature on a beach.
How likely high waves and cooler water are month by month, drawn from forecast and wave climate data, is on the Nusa Penida weather page. What the water means for a snorkel trip is on the snorkelling page, and for the mantas on the Manta Point page.
To cite a row, give its id, this page's address with the id after a #, and the read date; the citation note on the data page has an example. The data is licensed CC BY 4.0, with credit to nusapenida.info.